Annals of Coloproctology

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Metastasis or chemotherapy

Comparative effectiveness of bevacizumab, cetuximab, and panitumumab for improving outcomes in metastatic colorectal cancer: a propensity overlap weighting analysis: Yi-Chia Su, Chien-Chou Su, Pei-Ting Lee, Chih-Chien Wu; Ann Coloproctol. 2025;41(5):462-472. Published online October 27, 2025; DOI: https://doi.org/10.3393/ac.2025.00059.0008

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Abstract PDF Supplementary Material: Purpose
Metastatic colorectal cancer (mCRC) remains a leading cause of cancer-related mortality despite advancements in targeted therapies. Monoclonal antibody medications—namely, bevacizumab, cetuximab, and panitumumab—are widely used in combination with chemotherapy as first-line treatments for unresectable mCRC in patients harboring wild-type KRAS tumors. However, the comparative effectiveness of these treatments in improving survival outcomes has not been clearly evaluated. This study aimed to directly compare the effectiveness of these 3 targeted therapies on survival outcomes in patients with unresectable mCRC.
Methods
In this retrospective cohort study, we utilized Taiwan’s National Health Insurance Database and Taiwan Cancer Registry to identify patients newly diagnosed with mCRC who were treated with at least 6 cycles of bevacizumab, cetuximab, or panitumumab between 2011 and 2021. Propensity score overlap weighting was applied to adjust for baseline differences, and outcomes were evaluated using Cox proportional hazards models. Additionally, subgroup analyses were performed separately for left- and right-sided tumors.
Results
Among 4,849 patients, treatment with cetuximab and panitumumab was associated with improved overall survival compared to bevacizumab, particularly in patients with left-sided tumors (adjusted hazard ratio, 0.77 and 0.75, respectively). Both cetuximab and panitumumab also showed significantly higher rates of conversion surgery, with panitumumab demonstrating the strongest effect. For right-sided tumors, however, the effectiveness of all 3 agents was limited, and no significant differences were observed in overall survival.
Conclusion
Cetuximab and panitumumab were more effective than bevacizumab at improving survival outcomes and facilitating conversion surgery in left-sided mCRC. These findings highlight the importance of tumor laterality and molecular profiling in guiding therapeutic strategies.

Complications

Muscle loss phenotype predicts poor postoperative outcomes of colorectal cancer in US inpatients: a population-based analysis: Ko-Chao Lee, Sin-Ei Juang, Kuen-Lin Wu, Kung-Chuan Cheng, Ling-Chiao Song, Chien-En Tang, Hong-Hwa Chen, Kuan-Chih Chung; Ann Coloproctol. 2025;41(5):443-452. Published online October 24, 2025; DOI: https://doi.org/10.3393/ac.2025.00129.0018

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Abstract PDF Supplementary Material: Purpose
Muscle loss may lead to reduced therapy tolerance and survival. We aimed to assess whether colorectal cancer (CRC) patients with a muscle loss phenotype experience worse outcomes.
Methods
Data were extracted from the US Nationwide Inpatient Sample for hospitalized patients aged ≥20 years who underwent surgical resection for colorectal cancer (CRC) between 2005 and 2018. CRC and muscle loss phenotypes were identified using validated International Classification of Diseases (ICD) diagnosis and procedure codes. Propensity score matching was performed to balance characteristics. Regression analyses determined associations between muscle loss and in-hospital outcomes.
Results
A total of 209,171 patients were included, with a mean age of 67.9 years; 7.1% exhibited muscle loss phenotype. After matching, 60,295 patients remained in the sample. After adjustment, patients with muscle loss had significantly increased risks of postoperative complications (adjusted odds ratio [aOR], 2.99; 95% confidence interval [CI], 2.85–3.15), unfavorable discharge (aOR, 2.42; 95% CI, 2.30–2.53), prolonged length of stay (aOR, 4.34; 95% CI, 4.13–4.55), and higher total hospital costs (adjusted β, 70.86; 95% CI, 67.11–74.61) compared to patients without muscle loss. When stratified by age (≥65 years), results remained consistent. Among complications, muscle loss phenotype was most strongly associated with shock, sepsis, and respiratory failure.
Conclusion
Muscle loss phenotype among patients with CRC is strongly associated with poor postoperative outcomes, including higher complication rates, longer stays, and increased costs. These findings highlight the importance of preoperative muscle loss assessments and the necessity for targeted interventions.

Metastasis or chemotherapy

Short-term surgical outcomes following neoadjuvant immunotherapy in mismatch repair-deficient colorectal cancer: initial experience from a tertiary referral center: Ejaz Ahmed Latif, Ayman Abdelhafiz Ahmed, Mahmood Saad Al-Dhaheri, Ammar Aleter, Ali Toffaha, Mohamed Kurer, Tausief Fatima, Amjad Parvaiz, Mohmmad Hosni Abunada; Ann Coloproctol. 2025;41(4):338-345. Published online August 28, 2025; DOI: https://doi.org/10.3393/ac.2025.00381.0054

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Abstract PDF: Purpose
Immunotherapy has demonstrated remarkable efficacy in mismatch repair-deficient (MMR-D) colorectal cancer (CRC). Due to their significant response rates, immune checkpoint inhibitors have emerged as a promising neoadjuvant therapy. However, data regarding short-term surgical outcomes following immunotherapy remain limited. The aim of this study is to evaluate the safety and feasibility of surgical resection after immunotherapy, as well as its short-term clinical outcomes.
Methods
A retrospective review of prospectively collected data was performed at a tertiary referral center from January 2020 to July 2024. Fifteen consecutive patients with MMR-D CRC treated with pembrolizumab were analyzed. The patients’ demographics, tumor characteristics, clinical outcomes, and histopathological responses were assessed.
Results
In total, 15 patients diagnosed with MMR-D locally advanced or metastatic colorectal cancers received neoadjuvant immunotherapy followed by surgery. Of the 15 patients, 11 (73.3%) were male, 12 (80.0%) presented with T3/T4 tumors, and 3 (20.0%) had metastatic disease at diagnosis. The median number of immunotherapy cycles was 5 (range, 3–13). Surgery was performed without any anastomotic leaks or 30-day mortality. The median length of hospital stay was 5 days (range, 3–14 days). All surgical specimens had negative resection margins. Major pathological response was observed in 11 patients (73.3%), including complete response in 8 (53.3%) and near-complete response in 3 (20.0%). The median follow-up was 14 months (range, 1–56 months). One patient developed liver metastasis, which was successfully resected.
Conclusion
Surgical resection of MMR-D CRC following neoadjuvant immunotherapy is safe and associated with low morbidity. Neoadjuvant immunotherapy in MMR-D CRC facilitates high rates of major pathological response.

Colorectal cancer

Effects of clinical information on the treatment decisions for good responders to neoadjuvant chemoradiotherapy among rectal cancer patients: Eon Bin Kim, In Ja Park, Hwa Jung Kim, Jong Keon Jang, Seong Ho Park, Young Il Kim, Min Hyun Kim, Jong Lyul Lee, Chan Wook Kim, Yong Sik Yoon, Seok-Byung Lim, Chang Sik Yu; Ann Coloproctol. 2025;41(5):473-482. Published online July 10, 2025; DOI: https://doi.org/10.3393/ac.2024.00276.0039

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Abstract PDF Supplementary Material: Purpose
The decision for treatment after neoadjuvant chemoradiotherapy (nCRT) in rectal cancer is intricately linked to tumor response and clinical parameters. This study was designed to elucidate determinants influencing treatment decisions for good responders to nCRT, while concurrently evaluating the ramifications of modifications in magnetic resonance imaging (MRI) tumor response evaluation protocols.
Methods
A survey was constructed with 5 cases of good responder after nCRT based on the magnetic resonance–based tumor regression grade (mrTRG) criteria. A total of 35 colorectal surgeons in Korea participated in the survey via email, and they were introduced to 2 discrete MRI-based tumor response evaluation methodologies: the conventional mrTRG and an emergent complete response (CR)/non-CR classification system. Surgeons were directed to select between total mesorectal excision, local excision, or a watch and wait strategy.
Results
Treatment decisions varied significantly (P<0.01), as gradually more clinical information was provided with mrTRG. The paradigm shift from mrTRG to CR/non-CR evaluation criterion instigated the highest alteration in decision (P<0.01). Even comparing with other sets of information, decision change with different tumor response assessment (i.e., mrTRG vs. CR/non-CR) was statistically significant (P<0.01). Three particular cases consistently displayed a declining predilection for total mesorectal excision, favoring a more pronounced inclination towards watch and wait strategy or local excision. Nonetheless, the magnitude of these decisional shifts oscillated depending on the specific endoscopic imagery present.
Conclusion
Our current findings underscore the significant role of tumor response assessment methods in shaping treatment decisions for rectal cancer patients who respond well to nCRT. This highlights the need for clear and accurate tools to interpret MRI results.

ERAS

Early urinary catheter removal in patients undergoing rectal cancer surgery: a randomized controlled trial on silodosin versus no pharmacological treatment on urinary function in the early postoperative period: Žilvinas Gricius, Justas Kuliavas, Eugenijus Stratilatovas, Bronius Buckus, Audrius Dulskas; Ann Coloproctol. 2025;41(3):239-245. Published online June 20, 2025; DOI: https://doi.org/10.3393/ac.2024.00703.0100

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Purpose
This study aimed to evaluate the efficacy of the α1 adrenergic receptor antagonist silodosin in preventing lower urinary tract symptoms after rectal cancer surgery.
Methods
We conducted a 2-arm, double-blind, single-center randomized controlled trial. The study included 150 patients with rectal cancer who underwent radical surgery between 2019 and 2022. On the first postoperative day, the urinary catheter was removed for all patients. Of these, 100 patients were administered silodosin, while 50 patients (control group) receive placebo (glucose tablet). Urinary dysfunction (urinary retention, infection, dysuria) and other complications were monitored.
Results
Among the 150 patients, 84 (56.0%) were male and 66 (44.0%) were female. Surgical procedures included abdominoperineal resection in 33 patients, partial mesorectal excision in 45, and total mesorectal excision in 72. A laparoscopic approach was used in 69 patients, while the remaining 81 underwent open surgery. Urinary tract symptoms developed in 10 patients (6.7%): 7 (7.0%) in the silodosin group and 3 (6.0%) in the control group (P=0.92). In the silodosin group, there was 1 case (1.0%) of urinary retention, 3 cases (3.0%) of urinary tract infection, and 3 cases (3.0%) of dysuria. In the control group, there was 1 case (2.0%) each of urinary retention, urinary tract infection, and dysuria (all P=0.92).
Conclusion
Early urinary catheter removal on the first postoperative day was safe in both groups. The use of the oral α-antagonist silodosin did not provide additional benefits in preventing lower urinary tract symptoms in patients undergoing rectal cancer surgery. Trial registration: ClinicalTrials.gov identifier: NCT03607370

Citations

Citations to this article as recorded by

Less is more: simplifying patient-centered cancer care
In Ja Park
Annals of Coloproctology.2025; 41(3): 173. CrossRef

CRC

Relationships between MMP-2, MMP-9, and ADAMDEC1 serum and tissue levels in patients with colorectal cancer: Zahra Mozooni, Kiana Khajeh Amiri, Nafiseh Golestani, Alireza Shahmohammadi, Sara Minaeian, Leyla Bahadorizadeh; Ann Coloproctol. 2025;41(2):136-144. Published online April 29, 2025; DOI: https://doi.org/10.3393/ac.2024.00227.0032

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Abstract PDF Supplementary Material: Purpose
Colorectal cancer (CRC) is the most common malignancy of the gastrointestinal system globally. Identifying specific gene expression patterns indicative of early-stage CRC could enable early diagnosis and rapid treatment initiation. Matrix metalloproteinases (MMPs) play crucial roles in extracellular matrix degradation and tissue remodeling. Among them, MMP-2 and MMP-9 have been found to be upregulated in various cancers, including CRC, and are associated with tumor invasion, metastasis, and angiogenesis. In contrast, a disintegrin and metalloproteinase like decysin 1 (ADAMDEC1) is a relatively newly discovered gene with demonstrated involvement in immune response and inflammation. This study investigated serum levels of MMP-2 and MMP-9, along with tissue expression of MMP-2, MMP-9, and ADAMDEC1, and explored potential associations with pathological and clinical factors in patients with CRC.
Methods
This study included 100 patients with CRC and 100 control participants. Tissue and blood samples were collected. Serum MMP-2 and MMP-9 levels were analyzed using the enzyme-linked immunosorbent assay. Quantitative real-time polymerase chain reaction was employed to assess the expression levels of MMP-2, MMP-9, and ADAMDEC1 in CRC tissue samples compared to adjacent control tissue.
Results
The expression levels of MMP-2, MMP-9, and ADAMDEC1 were significantly upregulated in CRC relative to adjacent control tissues. Analysis of clinicopathological features revealed statistically significant differences in the expression levels of MMP-2, MMP-9, and ADAMDEC1 between patients with CRC with and without lymphovascular invasion (P<0.001). Based on receiver operating characteristic curve analysis, these genes represent promising candidate diagnostic biomarkers for CRC.
Conclusion
MMP-2, MMP-9, and ADAMDEC1 levels may serve as potential diagnostic biomarkers for CRC.

CRC

Impact of iron-deficiency anemia on short-term outcomes after resection of colorectal cancer liver metastasis: a US National (Nationwide) Inpatient Sample (NIS) analysis: Ko-Chao Lee, Yu-Li Su, Kuen-Lin Wu, Kung-Chuan Cheng, Ling-Chiao Song, Chien-En Tang, Hong-Hwa Chen, Kuan-Chih Chung; Ann Coloproctol. 2025;41(2):119-126. Published online April 24, 2025; DOI: https://doi.org/10.3393/ac.2024.00591.0084

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Abstract PDF Supplementary Material: Purpose
Colorectal cancer (CRC) often spreads to the liver, necessitating surgical treatment for CRC liver metastasis (CRLM). Iron-deficiency anemia is common in CRC patients and is associated with fatigue and weakness. This study investigated the effects of iron-deficiency anemia on the outcomes of surgical resection of CRLM.
Methods
This population-based, retrospective study evaluated data from adults ≥20 years old with CRLM who underwent hepatic resection. All patient data were extracted from the 2005–2018 US National (Nationwide) Inpatient Sample (NIS) database. The outcome measures were in-hospital outcomes including 30-day mortality, unfavorable discharge, and prolonged length of hospital stay (LOS), and short-term complications such as bleeding and infection. Associations between iron-deficiency anemia and outcomes were determined using logistic regression analysis.
Results
Data from 7,749 patients (representing 37,923 persons in the United States after weighting) were analyzed. Multivariable analysis revealed that iron-deficiency anemia was significantly associated with an increased risk of prolonged LOS (adjusted odds ratio [aOR], 2.76; 95% confidence interval [CI], 2.30–3.30), unfavorable discharge (aOR, 2.42; 95% CI, 1.83–3.19), bleeding (aOR, 5.05; 95% CI, 2.92–8.74), sepsis (aOR, 1.60; 95% CI, 1.04–2.46), pneumonia (aOR, 2.54; 95% CI, 1.72–3.74), and acute kidney injury (aOR, 1.71; 95% CI, 1.24–2.35). Subgroup analyses revealed consistent associations between iron-deficiency anemia and prolonged LOS across age, sex, and obesity status categories.
Conclusion
In patients undergoing hepatic resection for CRLM, iron-deficiency anemia is an independent risk factor for prolonged LOS, unfavorable discharge, and several critical postoperative complications. These findings underscore the need for proactive anemia management to optimize surgical outcomes.

Colorectal cancer

Is clinical complete response as accurate as pathological complete response in patients with mid-low locally advanced rectal cancer?: Niyaz Shadmanov, Vusal Aliyev, Guglielmo Niccolò Piozzi, Barıs Bakır, Suha Goksel, Oktar Asoglu; Ann Coloproctol. 2025;41(1):57-67. Published online February 28, 2025; DOI: https://doi.org/10.3393/ac.2024.00339.0048

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Graphical Abstract Abstract PDF

Purpose
The standard treatment for locally advanced rectal cancer involves neoadjuvant chemoradiation followed by total mesorectal excision surgery. A subset of patients achieves pathologic complete response (pCR), representing the optimal treatment outcome. This study compares the long-term oncological outcomes of patients who achieved pCR with those who attained clinical complete response (cCR) after total neoadjuvant therapy, managed using a watch-and-wait approach.
Methods
This study retrospectively evaluated patients with mid-low locally advanced rectal cancer who underwent neoadjuvant treatment from January 1, 2005, to May 1, 2023. The pCR and cCR groups were compared based on demographic, clinical, histopathological, and long-term survival outcomes.
Results
The median follow-up times were 54 months (range, 7–83 months) for the cCR group (n=73), 96 months (range, 7–215 months) for the pCR group (n=63), and 72 months (range, 4–212 months) for the pathological incomplete clinical response (pICR) group (n=627). In the cCR group, 15 patients (20.5%) experienced local regrowth, and 5 (6.8%) developed distant metastasis (DM). The pCR group had no cases of local recurrence, but 3 patients (4.8%) developed DM. Among the pICR patients, 58 (9.2%) experienced local recurrence, and 92 (14.6%) had DM. Five-year disease-free survival rates were 90.0% for cCR, 92.0% for pCR, and 69.5% for pICR (P=0.022). Five-year overall survival rates were 93.1% for cCR, 92.0% for pCR, and 78.1% for pICR. There were no significant differences in outcomes between the cCR and pCR groups (P=0.810); however, the pICR group exhibited poorer outcomes (P=0.002).
Conclusion
This study shows no significant long-term oncological differences between patients who exhibited cCR and those who experienced pCR.

Citations

Citations to this article as recorded by

Total neoadjuvant therapy in rectal cancer: The FOREST protocol, a patient‐centered approach that clusters two cohorts with different outcomes
Hector Guadalajara, Jose Luis Domínguez‐Tristancho, Raquel Fuentes Mateo, Miguel Leon‐Arellano, Raquel Sanz‐Baro, Eleonora Geraldi, Ana Isabel Hormigo‐Sanchez, Víctor Manuel Castellano Megías, Marta Pérez Cobos, Patricia Mellado Miras, Begoña Lopez‐Botet
International Journal of Cancer.2025;[Epub] CrossRef
The Shifting and Evolving Neoadjuvant Treatments and Surgical Platforms on Oncological Outcomes and Sphincter Preservation in Distal Rectal Cancer: A 23-Year Retrospective Experience
Niyaz Shadmanov, Vusal Aliyev, Barıs Bakır, Suha Goksel, Oktar Asoglu
Journal of Gastrointestinal Cancer.2025;[Epub] CrossRef

Colorectal cancer

Comparison of colorectal cancer surgery patients in intensive care between rural and metropolitan hospitals in Australia: a national cohort study: Jessica A. Paynter, Zakary Doherty, Chun Hin Angus Lee, Kirby R. Qin, Janelle Brennan, David Pilcher; Ann Coloproctol. 2025;41(1):68-76. Published online January 24, 2025; DOI: https://doi.org/10.3393/ac.2024.00269.0038

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Abstract PDF Supplementary Material

Purpose
A small proportion of colorectal cancer (CRC) surgical patients will require an admission to an intensive care unit (ICU) within the early postoperative period. This study aimed to compare the characteristics and outcomes of patients admitted to an ICU following CRC surgery per hospital type (metropolitan vs. rural) over a decade in Australia.
Methods
A retrospective cohort analysis was undertaken of all adult patients admitted to a participating Australian ICUs following CRC surgery between January 2011 and December 2021. The primary outcome was in-hospital mortality.
Results
Over the 10-year period, 19,611 patients were treated in 122 metropolitan ICUs and 4,108 patients were treated in 42 rural ICUs. Rural ICUs had a lower proportion of annual admissions following CRC surgery (20 vs. 36, P<0.001). Patients admitted to a rural ICU were more likely to have undergone emergency CRC surgery compared to those admitted to a metropolitan cohort (28.5% vs. 13.8%, P<0.001). There was no difference in in-hospital mortality between metropolitan and rural hospitals (odds ratio [OR], 1.03; 95% confidence interval [CI], 0.73–1.35; P=0.500). There was a general trend for lower mortality in later years of the study with the odds of death in the final year of the study (2021) almost half that of the first study year (OR, 0.52; 95% CI, 0.34–0.80; P=0.003).
Conclusion
There was no difference between in-hospital mortality outcomes for CRC surgical patients requiring ICU admission between metropolitan and rural hospitals. These findings may contribute to discussions regarding rural scope of colorectal practice within Australia and globally.

Citations

Citations to this article as recorded by

Intensive care unit outcomes and prognostic factors of colorectal cancer
Qian Dong, Rui Xia, Xue-Zhong Xing, Chang-Song Wang, Gang Ma, Hong-Zhi Wang, Biao Zhu, Jiang-Hong Zhao, Dong-Min Zhou, Li Zhang, Ming-Guang Huang, Rong-Xi Quan, Yong Ye, Guo-Xing Zhang, Zheng-Ying Jiang, Bing Huang, Shan-Ling Xu, Yun Xiao, Lin-Lin Zhang,
World Journal of Gastrointestinal Oncology.2025;[Epub] CrossRef

Minimally invasive surgery

New double-stapling technique without staple-crossing line in laparoscopic low anterior resection: effort to reduce anastomotic leakage: Nam Seok Kim, Ji Hoon Kim, Yoon Suk Lee, In Kyu Lee, Won Kyung Kang; Ann Coloproctol. 2024;40(6):573-579. Published online November 22, 2024; DOI: https://doi.org/10.3393/ac.2022.00409.0058

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Graphical Abstract Abstract PDF

Purpose
This study aimed to demonstrate the safety of new double-stapling technique (nDST), without a crossing line and dog ears, by comparing with conventional DST (cDST) in laparoscopic low anterior resection (LAR).
Methods
We retrospectively reviewed 98 consecutive patients who underwent laparoscopic LAR for rectal cancer from January 2018 to December 2020. The inclusion criterion was an anastomosis level below the peritoneal reflection and 4 cm above the anal verge. In the nDST group, the staple line of the linear cutter was sutured using barbed sutures to shorten the staple line before firing the circular stapler. Therefore, there were no crossing lines after firing the circular stapler. A 2:1 propensity score matching was performed between the cDST and nDST groups.
Results
After propensity score matching, 39 patients were in the cDST group and 20 were in the nDST group. There were no significant differences in patient demographics between the 2 groups. There was no difference in the total operation time between the cDST and nDST groups (124.0±26.2 minutes vs. 125.2±20.3 minutes, P=0.853). Morbidity rates were similar between the 2 groups (9 cases [23.1%] vs. 5 cases [25.0%], P=0.855). There was no significant difference in leakage rate (4 cases [10.3%] vs. 1 case [5.0%], P=0.847) and anastomotic bleeding rate (1 case [2.6%] vs. 3 cases [15.0%], P=0.211).
Conclusion
The nDST to eliminate the crossing line and dog ears in laparoscopic LAR is technically feasible and safe. However, more attention should be paid to anastomotic bleeding in such cases.

Citations

Citations to this article as recorded by

The robotic intracorporeal single-stapled anastomosis (RiSSA) technique in robotic left-sided colorectal resection: a technical note
Chih-Chien Wu, Yung-Lin Tan, Chao-Wen Hsu, Hsin-Ping Tseng, Danilo Miskovic, Shih-Feng Huang
Annals of Coloproctology.2025; 41(4): 357. CrossRef
Comparative perioperative outcomes of articulated versus conventional straight devices in laparoscopic low anterior resection: a propensity score–matched analysis
Hayoung Lee, Yong Sik Yoon, Young Il Kim, Min Hyun Kim, Jong Lyul Lee, Chan Wook Kim, In Ja Park, Seok-Byung Lim
Annals of Coloproctology.2025; 41(5): 434. CrossRef

Colorectal cancer

Preventive efficacy of hydrocortisone enema for radiation proctitis in rectal cancer patients undergoing short-course radiotherapy: a phase II randomized placebo-controlled clinical trial: Mohammad Mohammadianpanah, Maryam Tazang, Nam Phong Nguyen, Niloofar Ahmadloo, Shapour Omidvari, Ahmad Mosalaei, Mansour Ansari, Hamid Nasrollahi, Behnam Kadkhodaei, Nezhat Khanjani, Seyed Vahid Hosseini; Ann Coloproctol. 2024;40(5):506-514. Published online October 22, 2024; DOI: https://doi.org/10.3393/ac.2024.00192.0027

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Purpose
This study aimed to investigate the efficacy of hydrocortisone enema in preventing radiation proctitis in patients with rectal cancer undergoing short-course radiotherapy (SCRT).
Methods
This phase II randomized controlled trial enrolled patients with newly diagnosed locally advanced rectal cancer (clinically staged T3–4 and/or N1–2M0). Participants received a median of 4 cycles of neoadjuvant chemotherapy (capecitabine plus oxaliplatin) followed by 3-dimensional conformal SCRT (25 Gy in 5 fractions). Patients were randomly assigned to receive either a hydrocortisone enema (n=50) or a placebo (n=51) once daily for 5 consecutive days during SCRT. The primary endpoint was the incidence and severity of acute proctitis.
Results
Of the 111 eligible patients, 101 were included in the study. Baseline characteristics, including sex, age, performance status, and tumor location, were comparable across the treatment arms. None of the patients experienced grade 4 acute gastrointestinal toxicity or had to discontinue treatment due to treatment-related adverse effects. Patients in the hydrocortisone arm experienced significantly less severe proctitis (P<0.001), diarrhea (P=0.023), and rectal pain (P<0.001) than those in the placebo arm. Additionally, the duration of acute gastrointestinal toxicity following SCRT was significantly shorter in patients receiving hydrocortisone (P<0.001).
Conclusion
Hydrocortisone enema was associated with a significant reduction in the severity of proctitis, diarrhea, and rectal pain compared to placebo. Additionally, patients treated with hydrocortisone experienced shorter durations of gastrointestinal toxicity following SCRT. This study highlights the potential benefits of hydrocortisone enema in managing radiation-induced toxicity in rectal cancer patients undergoing radiotherapy.

Citations

Citations to this article as recorded by

Efficacy of Neoadjuvant Hypofractionated Chemoradiotherapy in Elderly Patients with Locally Advanced Rectal Cancer: A Single-Center Retrospective Analysis
Jae Seung Kim, Jaram Lee, Hyeung-min Park, Soo Young Lee, Chang Hyun Kim, Hyeong Rok Kim
Cancers.2024; 16(24): 4280. CrossRef

Colorectal cancer

The impact of short-course total neoadjuvant therapy, long-course chemoradiotherapy, and upfront surgery on the technical difficulty of total mesorectal excision: an observational study with an intraoperative perspective: Cheryl Xi-Zi Chong, Frederick H. Koh, Hui-Lin Tan, Sharmini Su Sivarajah, Jia-Lin Ng, Leonard Ming-Li Ho, Darius Kang-Lie Aw, Wen-Hsin Koo, Shuting Han, Si-Lin Koo, Connie Siew-Poh Yip, Fu-Qiang Wang, Fung-Joon Foo, Winson Jianhong Tan; Ann Coloproctol. 2024;40(5):451-458. Published online September 19, 2024; DOI: https://doi.org/10.3393/ac.2023.00899.0128

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Abstract PDF Supplementary Material

Purpose
Total neoadjuvant therapy (TNT) is becoming the standard of care for locally advanced rectal cancer. However, surgery is deferred for months after completion, which may lead to fibrosis and increased surgical difficulty. The aim of this study was to assess whether TNT (TNT-RAPIDO) is associated with increased difficulty of total mesorectal excision (TME) compared with long-course chemoradiotherapy (LCRT) and upfront surgery.
Methods
Twelve laparoscopic videos of low anterior resection with TME for rectal cancer were prospectively collected from January 2020 to October 2021, with 4 videos in each arm. Seven colorectal surgeons assessed the videos independently, graded the difficulty of TME using a visual analog scale and attempted to identify which category the videos belonged to.
Results
The median age was 67 years, and 10 patients were male. The median interval to surgery from radiotherapy was 13 weeks in the LCRT group and 24 weeks in the TNT-RAPIDO group. There was no significant difference in the visual analog scale for difficulty in TME between the 3 groups (LCRT, 3.2; TNT-RAPIDO, 4.6; upfront, 4.1; P=0.12). A subgroup analysis showed similar difficulty between groups (LCRT 3.2 vs. TNT-RAPIDO 4.6, P=0.05; TNT-RAPIDO 4.6 vs. upfront 4.1, P=0.54). During video assessments, surgeons correctly identified the prior treatment modality in 42% of the cases. TNT-RAPIDO videos had the highest recognition rate (71%), significantly outperforming both LCRT (29%) and upfront surgery (25%, P=0.01).
Conclusion
TNT does not appear to increase the surgical difficulty of TME.

Citations

Citations to this article as recorded by

Non-operative management of locally advanced rectal cancer with an emphasis on outcomes and quality of life: a narrative review
In Ja Park
Ewha Medical Journal.2025; 48(3): e40. CrossRef
Efficacy of Neoadjuvant Hypofractionated Chemoradiotherapy in Elderly Patients with Locally Advanced Rectal Cancer: A Single-Center Retrospective Analysis
Jae Seung Kim, Jaram Lee, Hyeung-min Park, Soo Young Lee, Chang Hyun Kim, Hyeong Rok Kim
Cancers.2024; 16(24): 4280. CrossRef

Reviews

Colorectal cancer

The role of lateral pelvic lymph node dissection in advanced rectal cancer: a review of current evidence and outcomes: Gyu-Seog Choi, Hye Jin Kim; Ann Coloproctol. 2024;40(4):363-374. Published online August 30, 2024; DOI: https://doi.org/10.3393/ac.2024.00521.0074

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Abstract PDF

Metastatic lateral pelvic lymph nodes (LPNs) in rectal cancer significantly impact the prognosis and treatment strategies. Western practices emphasize neoadjuvant chemoradiotherapy (CRT), whereas Eastern approaches often rely on LPN dissection (LPND). This review examines the evolving role of LPND in the context of modern treatments, including total neoadjuvant therapy (TNT), and the impact of CRT on the management of clinically suspicious LPNs. We comprehensively reviewed the key literature comparing the outcomes of LPND versus preoperative CRT for rectal cancer, focusing on recent advancements and ongoing debates. Key studies, including the JCOG0212 trial and recent multicenter trials, were analyzed to assess the efficacy of LPND, particularly in conjunction with preoperative CRT or TNT. Current evidence indicates that LPND can reduce local recurrence rates compared to total mesorectal excision alone in patients not receiving radiation therapy. However, the benefit of LPND in the context of neoadjuvant CRT is influenced by the size and pretreatment characteristics of LPNs. While CRT can effectively control smaller metastatic LPNs, larger or clinically suspicious LPNs may require LPND for optimal outcomes. Advances in surgical techniques, such as robotic-assisted LPND, offer potential benefits but also present challenges and complications. The role of TNT in controlling metastatic LPNs and improving patient outcomes is emerging but remains underexplored. The decision to perform LPND should be individualized based on patient-specific factors, including LPN size, response to neoadjuvant treatment, and surgeon expertise. Future research should focus on optimizing treatment protocols and further evaluating the role of TNT in managing metastatic LPNs.

Citations

Citations to this article as recorded by

Who is a candidate at the initial presentation? Prediction of positive lateral lymph node and survival after dissection
Y. Lee
Techniques in Coloproctology.2025;[Epub] CrossRef
The oncologic benefits of lateral lymph node dissection after neoadjuvant therapy – local control or survival?
T. Sammour
Techniques in Coloproctology.2025;[Epub] CrossRef
Laparoscopic Versus Robotic Lateral Pelvic Lymph Node Dissection in Locally‐Advanced Rectal Cancer: A Cohort Study Comparing Perioperative Morbidity and Short‐Term Oncological Outcomes
Joseph Mathew, Yogesh Kisan Bansod, Nishant Yadav, Janesh Murugan, Kovvuru Bhaskar Reddy, Mufaddal Kazi, Ashwin DeSouza, Avanish Saklani
Cancer Reports.2025;[Epub] CrossRef
Robotic-assisted colorectal surgery in colorectal cancer management: a narrative review of clinical efficacy and multidisciplinary integration
Engeng Chen, Li Chen, Wei Zhang
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Cirugía por cáncer de recto más allá del mesorrecto: indicaciones, preparación límites y resultados
Blas Flor-Lorente, Mario Javier de Miguel Valencia
Cirugía Española.2025; 103(9): 800202. CrossRef
Surgery for rectal cancer beyond the mesorectum: Indications, preparation, limits, and results
Blas Flor-Lorente, Mario J. de Miguel-Valencia
Cirugía Española (English Edition).2025; 103(9): 800202. CrossRef
Cancer-associated fibroblasts enhance colorectal cancer lymphatic metastasis via CLEC11A/LGR5-mediated WNT pathway activation
Chuhan Zhang, Teng Pan, Yuyuan Zhang, Yushuai Wu, Anning Zuo, Shutong Liu, Yuhao Ba, Benyu Liu, Shuaixi Yang, Yukang Chen, Hui Xu, Peng Luo, Quan Cheng, Siyuan Weng, Long Liu, Xing Zhou, Jingyuan Ning, Xinwei Han, Jinhai Deng, Zaoqu Liu
Journal of Clinical Investigation.2025;[Epub] CrossRef
Robotic lateral pelvic lymphadenectomy for rectal cancer—A video vignette
D. Castrodá, M. Paniagua, L. Pérez Corbal, L. Otalora, R. Oubiña, A. Parajó
Colorectal Disease.2025;[Epub] CrossRef
Learning curve for lateral lymph node dissection in rectal cancer – a systematic review of literature
D. Kehagias, L. Baldari, E. Cassinotti, L. Boni, C. Lampropoulos, I. Kehagias
Techniques in Coloproctology.2025;[Epub] CrossRef
Pelvic Neuroanatomy in Colorectal Surgery: Advances in Nerve Preservation for Optimized Functional Outcomes
Asim M. Almughamsi, Yasir Hassan Elhassan
Surgeries.2025; 6(4): 94. CrossRef
From the Editor: Uniting expertise, a new era of global collaboration in coloproctology
In Ja Park
Annals of Coloproctology.2024; 40(4): 285. CrossRef

Colorectal cancer

Essential knowledge and technical tips for total mesorectal excision and related procedures for rectal cancer: Min Soo Cho, Hyeon Woo Bae, Nam Kyu Kim; Ann Coloproctol. 2024;40(4):384-411. Published online August 30, 2024; DOI: https://doi.org/10.3393/ac.2024.00388.0055

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Abstract PDF

Total mesorectal excision (TME) has greatly improved rectal cancer surgery outcomes by reducing local recurrence and enhancing patient survival. This review outlines essential knowledge and techniques for performing TME. TME emphasizes the complete resection of the mesorectum along embryologic planes to minimize recurrence. Key anatomical insights include understanding the rectal proper fascia, Denonvilliers fascia, rectosacral fascia, and the pelvic autonomic nerves. Technical tips cover a step-by-step approach to pelvic dissection, the Gate approach, and tailored excision of Denonvilliers fascia, focusing on preserving pelvic autonomic nerves and ensuring negative circumferential resection margins. In Korea, TME has led to significant improvements in local recurrence rates and survival with well-adopted multidisciplinary approaches. Surgical techniques of TME have been optimized and standardized over several decades in Korea, and minimally invasive surgery for TME has been rapidly and successfully adopted. The review emphasizes the need for continuous research on tumor biology and precise surgical techniques to further improve rectal cancer management. The ultimate goal of TME is to achieve curative resection and function preservation, thereby enhancing the patient’s quality of life. Accurate TME, multidisciplinary-based neoadjuvant therapy, refined sphincter-preserving techniques, and ongoing tumor research are essential for optimal treatment outcomes.

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Robotic-assisted colorectal surgery in colorectal cancer management: a narrative review of clinical efficacy and multidisciplinary integration
Engeng Chen, Li Chen, Wei Zhang
Frontiers in Oncology.2025;[Epub] CrossRef
Golden vision: The potential of yellow enhancement in laparoscopic abdominal surgeries and surgical education
Harpreet Singh, Frederick Hong Xiang Koh
World Journal of Gastrointestinal Endoscopy.2025;[Epub] CrossRef
Comparing robot-assisted vs. laparoscopic proctectomy for rectal cancer surgical and oncological outcomes
Wenpeng Wang, Jia Liu, Jiefu Wang, Jinghao Huang, Junfeng Wang
Frontiers in Surgery.2025;[Epub] CrossRef
Early Complication Differences Between Laparoscopic and Open Abdominoperineal Resection
Sarkhail A Sayar, Rehan Ahmed, Syed Shafqatullah, Muhammad Asad, Muhammad Osama Iqbal, Resham Ali, Raja Jawad, Mukkaram Khan, Amna Fareed, Uroosa Shadani
Cureus.2025;[Epub] CrossRef
Robotic Versus Laparoscopic Low Anterior Resection: Comparison of Peri-Operative Outcomes at United Lincolnshire Teaching Hospitals NHS Trust
Nadeem Ahmad Bhat, Rajalakshmi Venkateswaran, Nuha Amri, Trisha Kanani, Athula Tennakoon, Amit Shukla, Sridhar Dharmavaram
Cureus.2025;[Epub] CrossRef
From the Editor: Uniting expertise, a new era of global collaboration in coloproctology
In Ja Park
Annals of Coloproctology.2024; 40(4): 285. CrossRef
Efficacy of Neoadjuvant Hypofractionated Chemoradiotherapy in Elderly Patients with Locally Advanced Rectal Cancer: A Single-Center Retrospective Analysis
Jae Seung Kim, Jaram Lee, Hyeung-min Park, Soo Young Lee, Chang Hyun Kim, Hyeong Rok Kim
Cancers.2024; 16(24): 4280. CrossRef

Original Article

Colorectal cancer

Lymphovascular invasion in colorectal cancers: can we predict it preoperatively?: Elbrus Zarbaliyev, Nihan Turhan, Sebahattin Çelik, Mehmet Çağlıkülekçi; Ann Coloproctol. 2024;40(3):245-252. Published online June 25, 2024; DOI: https://doi.org/10.3393/ac.2023.00458.0065

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Abstract PDF

Purpose
This study aimed to investigate preoperative predictors of lymphovascular invasion (LVI), which is a poor prognostic factor usually detected postoperatively in patients with colorectal cancer.
Methods
Results for all patients operated on for colorectal cancer between January 1, 2006, and December 31, 2021, were retrospectively analyzed. Potential preoperative factors and postoperative pathology results were recorded. The patients were categorized as those with LVI and those without LVI. Potential factors that may be associated with LVI were compared between the 2 groups.
Results
The study included 335 patients. The incidence of LVI was 3.11 times higher in patients with ascending colon tumors (odds ratio [OR], 3.11; 95% confidence interval [CI], 1.34–7.23; P=0.008) and 4.28 times higher in those with metastatic tumors (OR, 4.28; 95% CI, 2.18–8.39; P<0.001). Diabetes mellitus was inversely related to LVI in colorectal cancer patients; specifically, LVI was 56% less common in colorectal cancer patients with diabetes mellitus, irrespective of its duration (OR, 0.44; 95% CI, 0.25–0.76; P<0.001).
Conclusion
The presence of preoperative LVI in colorectal cancer patients is difficult to predict. In particular, the effect of the effect of factors such as chronic disease accompanied by microvascular pathologies on LVI is still unclear. Advances in the neoadjuvant treatment of colorectal cancer patients, who are becoming more widespread every day, will encourage the investigation of different methods of preoperatively predicting LVI as a poor prognostic factor in these patients.

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Immunohistochemical Expression of MLH1, PMS2 and P53 in Colorectal Carcinoma with Clinicopathologic Correlation
Saif Raghad Saleem Alhamadani, Zainab Khalid Shehab Almukhtar
Al-Rafidain Journal of Medical Sciences ( ISSN 2789-3219 ).2025; 9(1): 222. CrossRef

Review

Colorectal cancer

Survival outcomes of salvage surgery in the watch-and-wait approach for rectal cancer with clinical complete response after neoadjuvant chemoradiotherapy: a systematic review and meta-analysis: Wenjie Lin, Ian Jun Yan Wee, Isaac Seow-En, Aik Yong Chok, Emile Kwong-Wei Tan; Ann Coloproctol. 2023;39(6):447-456. Published online December 28, 2023; DOI: https://doi.org/10.3393/ac.2022.01221.0174

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Abstract PDF Supplementary Material

Purpose
This systematic review and meta-analysis compared the outcomes of the watch-and-wait (WW) approach versus radical surgery (RS) in rectal cancers with clinical complete response (cCR) after neoadjuvant chemoradiotherapy.
Methods
This study followed the PRISMA guidelines. Major databases were searched to identify relevant articles. WW and RS were compared through meta-analyses of pooled proportions. Primary outcomes included overall survival (OS), disease-free survival (DFS), local recurrence, and distant metastasis rates. Pooled salvage surgery rates and outcomes were also collected. The Newcastle-Ottawa scale was employed to assess the risk of bias.
Results
Eleven studies including 1,112 rectal cancer patients showing cCR after neoadjuvant chemoradiation were included. Of these patients, 378 were treated nonoperatively with WW, 663 underwent RS, and 71 underwent local excision. The 2-year OS (risk ratio [RR], 0.95; P = 0.94), 5-year OS (RR, 2.59; P = 0.25), and distant metastasis rates (RR, 1.05; P = 0.80) showed no significant differences between WW and RS. Local recurrence was more frequent in the WW group (RR, 6.93; P < 0.001), and 78.4% of patients later underwent salvage surgery (R0 resection rate, 97.5%). The 2-year DFS (RR, 1.58; P = 0.05) and 5-year DFS (RR, 2.07; P = 0.02) were higher among RS cases. However, after adjustment for R0 salvage surgery, DFS showed no significant between-group difference (RR, 0.82; P = 0.41).
Conclusion
Local recurrence rates are higher for WW than RS, but complete salvage surgery is often possible with similar long-term outcomes. WW is a viable strategy for rectal cancer with cCR after neoadjuvant chemoradiation, but further research is required to improve patient selection.

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Watch‐and‐Wait Approach Following Neoadjuvant Chemo‐Radiotherapy for Locally Advanced Rectal Cancer: A Retrospective Single‐Center Cohort Study
Georgi Kalev, Sylvia Buettner, Tianzuo Zhan, Ralf‐Dieter Hofheinz, Judit Boda‐Heggemann, Christoph Reissfelder, Steffen Seyfried, Georgi Vassilev, Julia Hardt
Journal of Surgical Oncology.2025; 131(4): 658. CrossRef
Phase 2, Multicenter, Open-label, Nonrandomized Study of Neoadjuvant Chemotherapy Liposomal Irinotecan With 5-Fluorouracil, Leucovorin, and Oxaliplatin, Followed by Chemoradiotherapy in Patients With Rectal Cancer in a Watch-and-Wait Program
César Muñoz, María-C. Riesco Martinez, Lisardo Ugidos, Pilar García-Alfonso, Rafael Alvarez-Gallego, Paloma Peinado, Carmen Toledano, Luka Mihic-Góngora, Justo Gabriel Ortega Anselmi, Enrique Sanz Garcia, Emilio Vicente, Yolanda Quijano, Hipólito J. Durán
American Journal of Clinical Oncology.2025; 48(3): 142. CrossRef
Therapeutic Management of Locally Advanced Rectal Cancer: Existing and Prospective Approaches
Horia-Dan Lișcu, Nicolae Verga, Dimitrie-Ionuț Atasiei, Andreea-Teodora Ilie, Maria Vrabie, Laura Roșu, Alexandra Poștaru, Stefania Glăvan, Adriana Lucaș, Maria Dinulescu, Andreea Delea, Andreea-Iuliana Ionescu
Journal of Clinical Medicine.2025; 14(3): 912. CrossRef
A management of patients achieving clinical complete response after neoadjuvant therapy and perspectives: on locally advanced rectal cancer
Yu-Xin Liu, Xin-Rong Yang, Lan-Qing Peng, Zhuo-Hong Li
Frontiers in Oncology.2025;[Epub] CrossRef
ACCORD study: a national multi‐centre study of the watch and wait approach in patients with rectal cancer in Aotearoa New Zealand

ANZ Journal of Surgery.2025; 95(3): 440. CrossRef
Watch and wait in early onset rectal cancer patients: A review of the literature
Melissa K Drezdzon, Carrie Y Peterson
Seminars in Colon and Rectal Surgery.2025; : 101117. CrossRef
Non-operative management of locally advanced rectal cancer with an emphasis on outcomes and quality of life: a narrative review
In Ja Park
Ewha Medical Journal.2025; 48(3): e40. CrossRef
Non-Operative Management (NOM) in Rectal Cancer: Current Evidence and Future Directions
Vincenzo Schiavone, Gabriella Teresa Capolupo, Gianluca Mascianà, Filippo Carannante, Gianluca Costa, Valentina Miacci, Marco Caricato
Encyclopedia.2025; 5(4): 165. CrossRef
Advancing Personalized Medicine in the Treatment of Locally Advanced Rectal Cancer
Francesco Giulio Sullo, Alessandro Passardi, Chiara Gallio, Chiara Molinari, Giorgia Marisi, Eleonora Pozzi, Leonardo Solaini, Alessandro Bittoni
Journal of Clinical Medicine.2024; 13(9): 2562. CrossRef
Tailoring rectal cancer surgery: Surgical approaches and anatomical insights during deep pelvic dissection for optimal outcomes in low‐lying rectal cancer
Youn Young Park, Nam Kyu Kim
Annals of Gastroenterological Surgery.2024; 8(5): 761. CrossRef
Combined Transanal and Laparoscopic Approach for Full-Thickness Local Excision of Locally Advanced Rectal Cancer Following Near-Complete Response after Chemotherapy
Joshua S. H. Lim, Si-Lin Koo, Iain Beehuat Tan, Isaac Seow-En
World Journal of Colorectal Surgery.2024; 13(3): 95. CrossRef

Original Articles

Colorectal cancer

Impact of consolidation chemotherapy in poor responders to neoadjuvant radiation therapy: magnetic resonance imaging–based clinical-radiological correlation in high-risk rectal cancers: Swapnil Patel, Suman Ankathi, Purvi Haria, Mufaddal Kazi, Ashwin L. Desouza, Avanish Saklani; Ann Coloproctol. 2023;39(6):474-483. Published online December 21, 2023; DOI: https://doi.org/10.3393/ac.2023.00080.0011

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Abstract PDF

Purpose
The current study was conducted to examine the role of consolidation chemotherapy after neoadjuvant radiation therapy (NART) in decreasing the involvement of the mesorectal fascia (MRF) in high-risk locally advanced rectal cancers (LARCs).
Methods
In total, 46 patients who received consolidation chemotherapy after NART due to persistent MRF involvement were identified from a database. A team of 2 radiologists, blinded to the clinical data, studied sequential magnetic resonance imaging (MRI) scans to assess the tumor response and then predict a surgical plan. This prediction was then correlated with the actual procedure conducted as well as histopathological details to assess the impact of consolidation chemotherapy.
Results
The comparison of MRI-based parameters of sequential images showed significant downstaging of T2 signal intensity, tumor height, MRF involvement, diffusion restriction, and N category between sequential MRIs (P < 0.05). However, clinically relevant downstaging (standardized mean difference, > 0.3) was observed for only T2 signal intensity and diffusion restriction on diffusion-weighted imaging. No clinically relevant changes occurred in the remaining parameters; thus, no change was noted in the extent of surgery predicted by MRI. Weak agreement (Cohen κ coefficient, 0.375) and correlation (Spearman rank coefficient, 0.231) were found between MRI-predicted surgery and the actual procedure performed. The comparison of MRI-based and pathological tumor response grading also showed a poor correlation.
Conclusion
Evidence is lacking regarding the use of consolidation chemotherapy in reducing MRF involvement in LARCs. The benefit of additional chemotherapy after NART in decreasing the extent of planned surgery by reducing margin involvement requires prospective research.

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Survival benefit of adjuvant chemotherapy in high-risk patients with colon cancer regardless of microsatellite instability
Sung Uk Bae, Jong Lyul Lee, Chun-Seok Yang, Eun Jung Park, Soo Yeun Park, Chang Woo Kim, Woong Bae Ji, Gyung Mo Son, Yoon Dae Han, So Hyun Kim, Min Sung Kim, Youn Young Park, Kyung Ha Lee, Chang Hyun Kim, Gi Won Ha, JaeIm Lee, Kyeong Eui Kim, Woon Kyung J
European Journal of Surgical Oncology.2025; 51(6): 109674. CrossRef
Non-operative management of locally advanced rectal cancer with an emphasis on outcomes and quality of life: a narrative review
In Ja Park
Ewha Medical Journal.2025; 48(3): e40. CrossRef
The conundrum of total neoadjuvant therapy in rectal cancer
Devesh S. Ballal, Tejas P. Vispute, Avanish P. Saklani
Colorectal Disease.2024; 26(5): 1068. CrossRef

Stoma

Benefits and risks of diverting stoma creation during rectal cancer surgery: Masaya Kawai, Kazuhiro Sakamoto, Kumpei Honjo, Yu Okazawa, Rina Takahashi, Shingo Kawano, Shinya Munakata, Kiichi Sugimoto, Shun Ishiyama, Makoto Takahashi, Yutaka Kojima, Yuichi Tomiki; Ann Coloproctol. 2024;40(5):467-473. Published online December 5, 2022; DOI: https://doi.org/10.3393/ac.2022.00353.0050

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8 Citations

Abstract PDF

Purpose
A consensus has been reached regarding diverting stoma (DS) construction in rectal cancer surgery to avoid reoperation related to anastomotic leakage. However, the incidence of stoma-related complications (SRCs) remains high. In this study, we examined the perioperative outcomes of DS construction in patients who underwent sphincter-preserving surgery for rectal cancer.
Methods
We included 400 participants who underwent radical sphincter-preserving surgery for rectal cancer between 2005 and 2017. These participants were divided into the DS (+) and DS (–) groups, and the outcomes, including postoperative complications, were compared.
Results
The incidence of ileus was higher in the DS (+) group than in the DS (–) group (P<0.01); however, no patients in the DS (+) group showed grade 3 anastomotic leakage. Furthermore, early SRCs were observed in 33 patients (21.6%) and bowel obstruction-related stoma outlet syndrome occurred in 19 patients (12.4%). There was no significant intergroup difference in the incidence of grade 3b postoperative complications. However, the most common reason for reoperation was different in the 2 groups: anastomotic leakage in 91.7% of patients with grade 3b postoperative complications in the DS (–) group, and SRCs in 85.7% of patients with grade 3b postoperative complications in the DS (+) group.
Conclusion
Patients with DS showed higher incidence rates of overall postoperative complications, severe postoperative complications (grade 3), and bowel obstruction, including stoma outlet syndrome, than patients without DS. Therefore, it is important to construct an appropriate DS to avoid SRCs and to be more selective in assigning patients for DS construction.

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Effects of Diverting Stoma Creation in Minimally Invasive Surgery for Rectal Cancer
Hirotaka Momose, Makoto Takahashi, Masaya Kawai, Kiichi Sugimoto, Hiromitsu Takahashi, Shunsuke Motegi, Kumpei Honjo, Yu Okazawa, Rina Takahashi, Shun Ishiyama, Yuichi Tomiki, Kazuhiro Sakamoto
Journal of the Anus, Rectum and Colon.2025; 9(1): 88. CrossRef
Prevalence and pooled risk factors of stoma outlet obstruction after colorectal surgery with diverting ileostomy: a systematic review and meta-analysis
Jian-xin Gan, Hai-peng Liu, Kang Chen
International Journal of Colorectal Disease.2025;[Epub] CrossRef
A multicentre prospective study of anal function after laparoscopic ultra‐low rectal cancer surgery using a mixed‐effects model
Makoto Takahashi, Kazuhiro Sakamoto, Yuichiro Tsukada, Shingo Kawano, Jun Watanabe, Yosuke Fukunaga, Yasumitsu Hirano, Hiroki Hamamoto, Masanori Yoshimitsu, Hisanaga Horie, Nobuhisa Matsuhashi, Yoshiaki Kuriu, Shuntaro Nagai, Madoka Hamada, Shinichi Yoshi
Colorectal Disease.2025;[Epub] CrossRef
The Effectiveness of Adipose Tissue-Derived Mesenchymal Stem Cells Mixed with Platelet-Rich Plasma in the Healing of Inflammatory Bowel Anastomoses: A Pre-Clinical Study in Rats
Georgios Geropoulos, Kyriakos Psarras, Maria Papaioannou, Vasileios Geropoulos, Argyri Niti, Christina Nikolaidou, Georgios Koimtzis, Nikolaos Symeonidis, Efstathios T. Pavlidis, Georgios Koliakos, Theodoros E. Pavlidis, Ioannis Galanis
Journal of Personalized Medicine.2024; 14(1): 121. CrossRef
Postoperative outcomes and identification of risk factors for complications after emergency intestinal stoma surgery – a multicentre retrospective study
Scott MacDonald, Li‐Siang Wong, Hwei Jene Ng, Claire Hastings, Immogen Ross, Tara Quasim, Susan Moug
Colorectal Disease.2024; 26(5): 994. CrossRef
Nomogram for predicting the probability of rectal anastomotic re-leakage after stoma closure: a retrospective study
Yuegang Li, Gang Hu, Jinzhu Zhang, Wenlong Qiu, Shiwen Mei, Xishan Wang, Jianqiang Tang
BMC Cancer.2024;[Epub] CrossRef
Early detection of anastomotic leakage in colon cancer surgery: the role of early warning score and C-reactive protein
Gyung Mo Son
Annals of Coloproctology.2024; 40(5): 415. CrossRef
Effect of intraoperative anastomotic reinforcement suture on the prevention of anastomotic leakage of double-stapling anastomosis for laparoscopic rectal cancer: a systematic review and meta-analysis
Chaoyang Wang, Xiaolong Li, Hao Lin, Jiahua Ju, Haibao Zhang, Yongjiang Yu
Langenbeck's Archives of Surgery.2023;[Epub] CrossRef

Colorectal cancer

Validation of the Vietnamese version of the low anterior resection syndrome score questionnaire: Tuong-Anh Mai-Phan, Vu Quang Pham; Ann Coloproctol. 2024;40(6):588-593. Published online November 25, 2022; DOI: https://doi.org/10.3393/ac.2022.00514.0073

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Abstract PDF Supplementary Material

Purpose
The aim of this study was to validate the low anterior resection syndrome (LARS) score questionnaire in the Vietnamese language among Vietnamese patients who underwent sphincter-preserving surgery for rectal cancer.
Methods
The LARS score questionnaire was translated from English into Vietnamese and then back-translated as recommended internationally. From January 2018 to December 2020, 93 patients who underwent sphincter-preserving surgery completed the Vietnamese version of the LARS score questionnaire together with an anchored question assessing the influence of bowel function on quality of life. To validate test-retest reliability, patients were requested to answer the LARS score questionnaire twice.
Results
Ninety-three patients completed the LARS score questionnaire, of whom 89 responded twice. The patients who responded twice were included in the analysis of test-retest reliability. Fifty-eight patients had a “major” LARS score. The LARS score was able to discriminate between patients who were obese and those who were not (P<0.001) and between the LAR and AR procedures (P<0.001). Age and sex were not associated with higher LARS scores (P=0.975). There was a perfect fit between the quality of life category question and the LARS score in 56.2% of cases, and a moderate fit was found in 42.7% of cases, showing reasonable convergent validity. The test-retest reliability of 89 patients showed a high intraclass correlation coefficient.
Conclusion
The Vietnamese version of the LARS score questionnaire is a valid tool for measuring LARS.

Citations

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Major Low Anterior Resection Syndrome (LARS) and Quality of Life in Patients With Low Rectal Cancer: A Preoperative Survey Using LARS Score and European Organisation for Research and Treatment of Cancer’s 30-Item Core Quality of Life Questionnaire
Ly Huu Phu, Ho Tat Bang, Nguyen Viet Binh, Hoang Danh Tan, Ung Van Viet, Nguyen Trung Tin
Cureus.2023;[Epub] CrossRef

Colorectal cancer

International Society of University Colon and Rectal Surgeons survey of surgeons’ preference on rectal cancer treatment: Audrius Dulskas, Philip F. Caushaj, Domas Grigoravicius, Liu Zheng, Richard Fortunato, Joseph W. Nunoo-Mensah, Narimantas E. Samalavicius; Ann Coloproctol. 2023;39(4):307-314. Published online October 11, 2022; DOI: https://doi.org/10.3393/ac.2022.00255.0036

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Graphical Abstract Abstract PDF Supplementary Material

Purpose
Rectal cancer treatment has a wide range of possible approaches from radical extirpative surgery to nonoperative watchful waiting following chemoradiotherapy, with or without, additional chemotherapy. Our goal was to assess the personal opinion of active practicing surgeons on rectal cancer treatment if he/she was the patient.
Methods
A panel of the International Society of University Colon and Rectal Surgeons (ISUCRS) selected 10 questions that were included in a questionnaire that included other items including demographics. The questionnaire was distributed electronically to ISUCRS fellows and other surgeons included in our database and remained open from April 16 to 28, 2020.
Results
One hundred sixty-three specialists completed the survey. The majority of surgeons (n=65, 39.9%) chose the minimally invasive (laparoscopic) surgery for their personal treatment of rectal cancer. For low-lying rectal cancer T1 and T2, the treatment choice was standard chemoradiation+local excision (n=60, 36.8%) followed by local excision±chemoradiotherapy if needed (n=55, 33.7%). In regards to locally advanced low rectal cancer T3 or greater, the preference of the responders was for laparoscopic surgery (n=65, 39.9%). We found a statistically significant relationship between surgeons’ age and their preference for minimally invasive techniques demonstrating an age-based bias on senior surgeons’ inclination toward open approach.
Conclusion
Our survey reveals an age-based preference by surgeons for minimally invasive surgical techniques as well as organ-preserving techniques for personal treatment of treating rectal cancer. Only 1/4 of specialists do adhere to the international guidelines for treating early rectal cancer.

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Performance reporting design in artificial intelligence studies using image-based TNM staging and prognostic parameters in rectal cancer: a systematic review
Minsung Kim, Taeyong Park, Bo Young Oh, Min Jeong Kim, Bum-Joo Cho, Il Tae Son
Annals of Coloproctology.2024; 40(1): 13. CrossRef
Sex Disparities in Rectal Cancer Surgery: An In-Depth Analysis of Surgical Approaches and Outcomes
Chungyeop Lee, In Ja Park
The World Journal of Men's Health.2024; 42(2): 304. CrossRef
Effects of Adjuvant Chemotherapy on Oncologic Outcomes in Patients With Stage ⅡA Rectal Cancer Above the Peritoneal Reflection Who Did Not Undergo Preoperative Chemoradiotherapy
Hyo Seon Ryu, Jong Lyul Lee, Chan Wook Kim, Yong Sik Yoon, In Ja Park, Seok-Byung Lim, Yong Sang Hong, Tae Won Kim, Chang Sik Yu
Clinical Colorectal Cancer.2024; 23(4): 392. CrossRef
Comparative analysis of organ preservation attempt and radical surgery in clinical T2N0 mid to low rectal cancer
Hyeung-min Park, Jaram Lee, Soo Young Lee, Chang Hyun Kim, Hyeong Rok Kim
International Journal of Colorectal Disease.2024;[Epub] CrossRef
Beyond survival: a comprehensive review of quality of life in rectal cancer patients
Won Beom Jung
Annals of Coloproctology.2024; 40(6): 527. CrossRef
Unveiling the profound advantages of total neoadjuvant therapy in rectal cancer: a trailblazing exploration
Kyung Uk Jung, Hyung Ook Kim, Hungdai Kim, Donghyoun Lee, Chinock Cheong
Annals of Surgical Treatment and Research.2023; 105(6): 341. CrossRef

An investigation into tumor regression grade as a parameter for locally advanced rectal cancer and 5-year overall survival rate: Supparerk Laohawiriyakamol, Wongsakorn Chaochankit, Worawit Wanichsuwan, Kanet Kanjanapradit, Teeranan Laohawiriyakamol; Ann Coloproctol. 2023;39(1):59-70. Published online March 18, 2022; DOI: https://doi.org/10.3393/ac.2021.01011.0144

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Abstract PDF

Purpose
The standard treatment for locally advanced rectal cancer (LARC) is neoadjuvant chemoradiation (nCRT) followed by surgery. Several parameters are associated with patient survival in LARC. One of these parameters is tumor regression grade (TRG); however, the significance of TRG remains controversial. In this study, we aimed to examine the correlations of TRG with 5-year overall (OS) and relapse-free survival (RFS) and identify other factors that influence the survival rates in LARC after nCRT followed by surgery.
Methods
This retrospective study included 104 patients diagnosed with LARC who underwent nCRT followed by surgery at Songklanagarind Hospital from January 2010 to December 2015. All patients received fluoropyrimidine-based chemotherapy at a total dose of 45.0 to 50.4 Gy in 25 daily fractions. Tumor response was evaluated using the 5-tier Mandard TRG classification. TRG was categorized into good (TRG 1–2) and poor (TRG 3–5) responses.
Results
TRG (classified by either the 5-tier classification system or the 2-group classification system) was not correlated with 5-year OS or RFS. The 5-year OS rates were 80.0%, 54.5%, 80.8%, and 67.4% in patients with TRG 1, 2, 3, and 4, respectively (P=0.22). Poorly differentiated rectal cancer and systemic metastasis were associated with poor 5-year OS. Intraoperative tumor perforation, poor differentiation, and perineural invasion were correlated with inferior 5-year RFS.
Conclusion
TRG was probably not associated with either 5-year OS or RFS; however, poor differentiation and systemic metastasis were strongly associated with poor 5-year OS.

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Is Mandard tumor regression grade scoring sufficient for locally advanced rectal cancer?
Buket Şahin Çelik, Aslı Geçgel, Erdem Göker
Medical Science and Discovery.2025; 12(1): 1. CrossRef
Risk score model for predicting local control and survival in patients with rectal cancer treated with neoadjuvant chemoradiotherapy
Tuba Kurt Catal, Günay Can, İsmai̇l Demi̇rel, Sefi̇ka Ergen, Di̇dem Öksüz
Oncology Letters.2025; 29(5): 1. CrossRef
Evaluation of pre-treatment F-18 FDG PET/CT according to Mandard classification in locally advanced rectal cancer patients undergoing neoadjuvant chemoradiotherapy
Feray Aras, Murtaza Parvizi, Olcay Ak Nalbant, Volkan Ozkol, Engin Kut
BMC Cancer.2025;[Epub] CrossRef
Performance reporting design in artificial intelligence studies using image-based TNM staging and prognostic parameters in rectal cancer: a systematic review
Minsung Kim, Taeyong Park, Bo Young Oh, Min Jeong Kim, Bum-Joo Cho, Il Tae Son
Annals of Coloproctology.2024; 40(1): 13. CrossRef
Risk-factors for locally advanced rectal cancer relapse after neoadjuvant chemoradiotherapy: A single center experience
Dragana Stupar, Saša Jungić, Zdenka Gojković, Jelena Berendika, Živojin Janičić
Medicine.2023; 102(44): e35519. CrossRef

Malignant disease,Colorectal cancer,Epidemiology & etiology

Clinicopathologic characteristics of early-onset colorectal cancer: Kui Seon Park, Young Ki Hong, Yoon Jung Choi, Jung Gu Kang; Ann Coloproctol. 2022;38(5):362-369. Published online March 11, 2022; DOI: https://doi.org/10.3393/ac.2021.00976.0139

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Abstract PDF

Purpose
The aim of this study was to analysis of the clinicopathological characteristics and prognosis of colorectal cancer (CRC) under the age of 50 years.
Methods
Between January 2009 and December 2018, 1,126 primary CRC patients were included from National Health Insurance Service Ilsan Hospital. The patients were divided into group 1 (n=111, ≤50 years) and group 2 (n=1,015, >50 years). The clinicopathologic features and prognostic outcomes were compared. In addition, to analyze whether there were any differences of those characteristics in 3 groups, patients aged under 50 years were divided into their 20s, 30s, and 40s.
Results
Group 1 had a slightly higher distribution in the left colon and rectum, lower T stage I and higher T stage IV rate, and a significantly higher distribution in stage N2 than group 2 (30.6%:16.3%, P<0.001). Poor histological differentiation of tumors was significantly high in group 1 (P=0.003). The 5-year survival rate for those in their 30s (69.2%) and 40s (91.6%) was higher than those in their 20s who died immediately after surgery (P<0.001). The 5-year disease-free survival rate was also confirmed to be meaningful for each age group, with 0% in their 20s, 53.8% in their 30s, 79.2% in their 40s (P<0.001).
Conclusion
Although the age was not an independent prognostic factor for overall survival in this study, the early onset group of CRCs is more advanced at the time of diagnosis and has a more aggressive histologic type.

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Review

Malignant disease,Prognosis and adjuvant therapy,Colorectal cancer,Surgical technique

Treatment for Peritoneal Metastasis of Patients With Colorectal Cancer: Young Jin Kim, Chang Hyun Kim; Ann Coloproctol. 2021;37(6):425-433. Published online December 22, 2021; DOI: https://doi.org/10.3393/ac.2021.00920.0131

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229 Download
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Abstract PDF

From the perspective of survival outcomes, the cancer survival of colorectal cancer (CRC) in the whole stage has improved. Peritoneal metastasis (PM) is found in approximately 8% to 15% of patients with CRC, with a poorer prognosis than that associated with other sites of metastases. Randomized controlled trials and up-to-date meta-analyses provide firm evidence that cytoreductive surgery (CRS) plus hyperthermic intraperitoneal chemotherapy (HIPEC) could significantly improve overall survival compared with systemic chemotherapy alone in selected patients with CRC-PM. Practical guidelines recommend that the management of CRC-PM should be led by a multidisciplinary team carried out in experienced centers and consider CRS plus HIPEC for selected patients. In this review, we aim to provide the latest results of land mark studies and an overview of recent insights with regard to the management of CRC-PM.

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Original Article

Malignant disease, Rectal cancer,Prognosis and adjuvant therapy,Colorectal cancer

Lateral Pelvic Lymph Node Dissection After Neoadjuvant Chemoradiotherapy in Patients With Rectal Cancer: A Single-Center Experience and Literature Review: Min Chul Kim, Jae Hwan Oh; Ann Coloproctol. 2021;37(6):382-394. Published online December 22, 2021; DOI: https://doi.org/10.3393/ac.2021.00913.0130

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Abstract PDF Supplementary Material

Purpose
We aimed to evaluate the surgicopathological outcomes of lateral pelvic lymph node dissection (LPLD) and long-term oncological outcomes of selective LPLD after neoadjuvant chemoradiotherapy (nCRT) in patients with locally advanced rectal cancer and compare them to those of total mesorectal excision (TME) alone based on pretreatment magnetic resonance imaging (MRI).
Methods
We compared the TME-alone group (2001–2009, n=102) with the TME with LPLD group (2011–2016, n=69), both groups having lateral lymph nodes (LLNs) of ≥5 mm in short axis diameter. The surgicopathological outcomes were analyzed retrospectively. Oncological outcomes were analyzed using the Kaplan-Meier method.
Results
The rates of overall postoperative 30-day morbidity (42.0% vs. 26.5%, P=0.095) and urinary retention (13.7% vs. 10.1%, P=0.484) were not significantly different between the LPLD and TME-alone groups, respectively. Pathologically proven LLN metastasis was identified in 24 (34.8%) LPLD cases after nCRT. The LPLD group showed a lower 5-year local recurrence (LR) rate (27.9% vs. 4.6%, P<0.001) and better recurrence-free survival (RFS) (59.6% vs. 78.2%, P=0.008) than those of the TME-alone group, while the 5-year overall survival was not significantly different between the 2 groups (76.2% vs. 86.5%, P=0.094).
Conclusion
This study suggests that LPLD is a safe and feasible procedure. The oncological outcomes suggest that selective LPLD improves LR and RFS in patients with clinically suspicious LLNs on pretreatment MRI. Considering that lateral nodal disease is not common, a multicenter large-scale study is necessary.

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Review

Malignant disease, Rectal cancer ,Functional outcomes,Colorectal cancer,Minimally invasive surgery

Robotic Intersphincteric Resection for Low Rectal Cancer: Technical Controversies and a Systematic Review on the Perioperative, Oncological, and Functional Outcomes: Guglielmo Niccolò Piozzi, Seon Hahn Kim; Ann Coloproctol. 2021;37(6):351-367. Published online November 17, 2021; DOI: https://doi.org/10.3393/ac.2021.00836.0119

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Abstract PDF

Intersphincteric resection (ISR) is the ultimate anus-sparing technique for low rectal cancer and is considered an oncologically safe alternative to abdominoperineal resection. The application of the robotic approach to ISR (RISR) has been described by few specialized surgical teams with several differences regarding approach and technique. This review aims to discuss the technical aspects of RISR by evaluating point by point each surgical controversy. Moreover, a systematic review was performed to report the perioperative, oncological, and functional outcomes of RISR. Postoperative morbidities after RISR are acceptable. RISR allows adequate surgical margins and adequate oncological outcomes. RISR may result in severe bowel and genitourinary dysfunction affecting the quality of life in a portion of patients.

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Xuejun Jiang, Zujin Ji, Xinyi Lei, Cui Liu, Fangjun Yuan
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Antoinette Afua Asiedua Bediako-Bowan, Narious Naalane, Jonathan C. B. Dakubo
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Gyoung Tae Noh
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Jeonghee Han
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In Ja Park
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Won Beom Jung
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Original Articles

Malignant disease, Rectal cancer,Prognosis

Initial local excision for clinical T1 rectal cancer showed comparable overall survival despite high local recurrence rate: a propensity-matched analysis: Jong Hee Hyun, Mohamed K. Alhanafy, Hyoung-Chul Park, Su Min Park, Sung-Chan Park, Dae Kyung Sohn, Duck-Woo Kim, Sung-Bum Kang, Seung-Yong Jeong, Kyu Joo Park, Jae Hwan Oh, on behalf of the Seoul Colorectal Research Group (SECOG); Ann Coloproctol. 2022;38(2):166-175. Published online October 6, 2021; DOI: https://doi.org/10.3393/ac.2021.00479.0068

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193 Download
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Abstract PDF

Purpose
Local excision (LE) is an alternative initial treatment for clinical T1 rectal cancer, and has avoided potential morbidity. This study aimed to evaluate the clinical outcomes of LE compared with total mesorectal excision (TME) for clinical T1 rectal cancer.
Methods
Between January 2000 and December 2011, we retrospectively reviewed from multicenter data in patients with clinically suspected T1 rectal cancer treated with either LE or TME. Of 1,071 patients, 106 were treated with LE and 965 were treated with TME. The data were analyzed using propensity score matching, with each group comprising 91 patients.
Results
After propensity score matching, the median follow-up time was 60.8 months (range, 0.6–150.6 months). After adjustment for the necessary variables, patients who underwent LE showed a significantly higher local recurrence rate than did those who underwent TME; however, there were no differences in disease-free survival and overall survival. In the multivariate analysis, age (hazard ratio [HR], 9.620; 95% confidence interval [CI], 3.415–27.098; P<0.001) and angiolymphatic invasion (HR, 3.63; 95% confidence interval, 1.33–9.89; P=0.012) were independently associated with overall survival. However, LE was neither associated with overall survival nor disease-free survival.
Conclusion
LE for clinical T1 rectal cancer yielded a higher local recurrence rate than did TME. Nevertheless, LE provided comparable overall survival rate and can be proposed as an optional treatment in terms of organ-preserving strategies.

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Performance reporting design in artificial intelligence studies using image-based TNM staging and prognostic parameters in rectal cancer: a systematic review
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Sex Disparities in Rectal Cancer Surgery: An In-Depth Analysis of Surgical Approaches and Outcomes
Chungyeop Lee, In Ja Park
The World Journal of Men's Health.2024; 42(2): 304. CrossRef
Survival prognostic in different age groups of patients undergoing local versus radical excision for rectal cancer: a study based on the SEER database
Jinghui Li, Liang Wen, Yongli Ma, Guosheng Zhang, Ping Wang, Chengzhi Huang, Xueqing Yao
Updates in Surgery.2024; 76(3): 975. CrossRef
Comparative analysis of organ preservation attempt and radical surgery in clinical T2N0 mid to low rectal cancer
Hyeung-min Park, Jaram Lee, Soo Young Lee, Chang Hyun Kim, Hyeong Rok Kim
International Journal of Colorectal Disease.2024;[Epub] CrossRef
Organ preservation for early rectal cancer using preoperative chemoradiotherapy
Gyung Mo Son
Annals of Coloproctology.2023; 39(3): 191. CrossRef
Surgical Techniques for Transanal Local Excision for Early Rectal Cancer
Gyoung Tae Noh
The Ewha Medical Journal.2023;[Epub] CrossRef
How Can We Improve the Tumor Response to Preoperative Chemoradiotherapy for Locally Advanced Rectal Cancer?
Jeonghee Han
The Ewha Medical Journal.2023;[Epub] CrossRef
Multidisciplinary treatment strategy for early rectal cancer
Gyung Mo Son, In Young Lee, Sung Hwan Cho, Byung-Soo Park, Hyun Sung Kim, Su Bum Park, Hyung Wook Kim, Sang Bo Oh, Tae Un Kim, Dong Hoon Shin
Precision and Future Medicine.2022; 6(1): 32. CrossRef
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Chang Hyun Kim
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Applications of propensity score matching: a case series of articles published in Annals of Coloproctology
Hwa Jung Kim
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Malignant disease,Prognosis and adjuvant therapy,Colorectal cancer

Comparison of the oncological outcomes of stenting as a bridge to surgery and surgery alone in stages II to III obstructive colorectal cancer: a retrospective study: Hiroaki Uehara, Toshiyuki Yamazaki, Akira Iwaya, Hitoshi Kameyama, Masaru Komatsu, Motoharu Hirai; Ann Coloproctol. 2022;38(3):235-243. Published online July 13, 2021; DOI: https://doi.org/10.3393/ac.2020.01067.0152

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222 Download
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12 Citations

Graphical Abstract Abstract PDF

Purpose
We evaluated the oncological outcomes of bridge to surgery (BTS) using stent compared with surgery alone for obstructive colorectal cancer.
Methods
Consecutive patients who underwent curative resection for stages II to III obstructive colorectal cancer at our institution from January 2009 to March 2020, were registered retrospectively and divided into 43 patients in the BTS group and 65 patients in the surgery alone group. We compared the surgical and oncological outcomes between the 2 groups.
Results
Stent-related perforation did not occur. One patient in whom the stent placement was unsuccessful underwent emergency surgery with poor decompression (clinical success rate, 97.7%). The pathological characteristics were not significantly different between the groups. The following surgical outcomes in the BTS group were superior to those in the surgery alone group; nonemergency surgery (P<0.001), surgical approach (P=0.006), and length of hospital stay (P=0.020). The median follow-up time was 44.9 months (range, 1.1–126.5 months). The 3-year relapse-free survival rates were 68.4% and 58.2% (P=0.411), and the overall survival rates were 78.3% and 88.2% (P=0.255) in the surgery alone and BTS groups, respectively. The 3-year locoregional recurrence rates were 10.2% and 8.0% (P=0.948), and distant metastatic recurrence rates were 13.3% and 30.4% (P=0.035) in the surgery alone and BTS groups, respectively.
Conclusion
This study revealed that BTS with stent may be associated with a higher frequency of distant metastatic recurrence. Stent for stages II to III obstructive colorectal cancer potentially worsens oncological outcomes.

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Sheza Malik, Priyadarshini Loganathan, Hajra Khan, Abul Hasan Shadali, Pradeep Yarra, Saurabh Chandan, Babu P. Mohan, Douglas G. Adler, Shivangi Kothari
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Chloe Lahoud, Toni Habib, Michel Al Achkar, Tyler Grantham, Nissar Ahmed
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Tilal Ahmed Raza, Hussain Jan Abbasi, Farrukh Ozair, Hajra Imtiaz
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Soo Young Oh, Chan Wook Kim, Seonok Kim, Min Hyun Kim, Young Il Kim, Jong Lyul Lee, Yong Sik Yoon, In Ja Park, Seok-Byung Lim, Chang Sik Yu
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Saday A. Aliyev, Emil S. Aliyev
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Hideyuki Suzuki, Shingo Tsujinaka, Yoshihiro Sato, Tomoya Miura, Chikashi Shibata
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Noura S Alhassan, Sulaiman A AlShammari, Razan N AlRabah, Amirah M AlZahrani, Maha-Hamadien Abdulla, Thamer A Bin Traiki, Ahmad M Zubaidi, Omar A Al-Obeed, Khayal A Alkhayal
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Su Hyeong Park, Hye Seung Woo, In Kyung Hong, Eun Jung Park
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Ji-Hyun Seo, In-Ja Park
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Hyo Seon Ryu, Jin Kim, Ye Ryung Park, Eun Hae Cho, Jeong Min Choo, Ji-Seon Kim, Se-Jin Baek, Jung-Myun Kwak
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Margherita Binetti, Augusto Lauro, Valeria Tonini
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Malignant disease, Rectal cancer,Colorectal cancer,Biomarker & risk factor

Prognostic Value of Neutrophil-to-Lymphocyte Ratio in Obstructing Colorectal Cancer Treated by Endoscopic Stenting as a Bridge to Surgery: Jiwei Guo, Aik Yong Chok, Hui Jun Lim, Wei Xuan Tay, Weng Kit Lye, Lasitha Bhagya Samarakoon, Emile John Tan, Ronnie Mathew; Ann Coloproctol. 2021;37(3):159-165. Published online May 28, 2021; DOI: https://doi.org/10.3393/ac.2020.05.25

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Abstract PDF Supplementary Material

Purpose
Neutrophil-to-lymphocyte ratio (NLR) has been reported to predict adverse survival outcomes among patients with colorectal cancer (CRC). This study evaluates the prognostic value of NLR among patients with obstructing CRC who successfully underwent stenting before curative surgery.
Methods
We retrospectively reviewed patients who underwent stenting before surgery. Patient demographics, tumor characteristics, perioperative outcomes, recurrence-free survival (RFS), and overall survival (OS) were analyzed. NLR was calculated from the differential white blood cell counts at least 4 days after successful stenting, before elective surgery. Optimal cutoff to dichotomize NLR was obtained by maximizing log-rank test statistic with recursive partitioning of KaplanMeier RFS and OS curves. The optimal cutoff for high NLR was ≥ 5 at presentation before stenting, and ≥ 4 after stenting.
Results
Fifty-seven patients with localized obstructing CRC underwent successful endoscopic stenting before curative surgery. High NLR was associated with lymphovascular invasion (P = 0.006) and apical lymph node involvement (P = 0.034). Major perioperative complication(s) (hazard ratio [HR], 11.34; 95% confidence interval [CI], 2.49 to 51.56; P < 0.01) and high NLR (HR, 3.69; 95% CI, 1.46 to 9.35; P < 0.01) negatively impacted OS on univariate and multivariate analyses. High NLR negatively impacted RFS on univariate analysis (HR, 2.91; 95% CI, 1.29 to 6.60; P = 0.01).
Conclusion
NLR of ≥ 4 after stenting is an independent prognostic factor among patients with obstructing localized CRC who are successfully decompressed by endoscopic stenting before curative surgery.

Citations

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Su Hyeong Park, Hye Seung Woo, In Kyung Hong, Eun Jung Park
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Minsung Kim, Il Tae Son, Bo Young Oh
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Annals of Coloproctology.2022; 38(2): 97. CrossRef

Case Report

Malignant disease, Rectal cancer,Colorectal cancer,Complication

Neorectal Mucosal Prolapse After Intersphincteric Resection for Low-Lying Rectal Cancer: A Case Report: Mohammed Alessa, Hyeon Woo Bae, Homoud Alawfi, Ahmad Sakr, Fozan Sauri, Nam Kyu Kim; Ann Coloproctol. 2021;37(Suppl 1):S15-S17. Published online April 22, 2021; DOI: https://doi.org/10.3393/ac.2020.02.22

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92 Download
6 Web of Science
7 Citations

Abstract PDF

Radical resection for low rectal cancer is the mainstay among the treatment modalities. Intersphincteric resection (ISR) is considered a relatively new but effective surgical treatment for low-lying rectal tumor. As the sphincter preserving techniques get popularized, we notice uncommon complication associated with it in the form of rectal mucosal prolapse. We presented 2 rare cases that developed neorectal mucosa prolapse after ISR a complication following low rectal cancer surgery. Although ISR is a safe and effective surgical technique for low rectal cancer, it should be considered to correct modifiable possible risk factors. Also, Delorme procedure is good option for management of neorectal mucosal prolapse.

Citations

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Tailoring rectal cancer surgery: Surgical approaches and anatomical insights during deep pelvic dissection for optimal outcomes in low‐lying rectal cancer
Youn Young Park, Nam Kyu Kim
Annals of Gastroenterological Surgery.2024; 8(5): 761. CrossRef
Treatment of side limb full-thickness prolapse of the side-to-end coloanal anastomosis following intersphincteric resection: a case report and review of literature
Guglielmo Niccolò Piozzi, Krunal Khobragade, Seon Hui Shin, Jeong Min Choo, Seon Hahn Kim
Annals of Coloproctology.2024; 40(Suppl 1): S38. CrossRef
Surgical Treatment for Mucosal Prolapse after Intersphincteric Resection
Rina Takahashi, Makoto Takahashi, Yuki Ii, Megumi Kawaguchi, Hirotaka Momose, Shunsuke Motegi, Ryoichi Tsukamoto, Yu Okazawa, Masaya Kawai, Kiichi Sugimoto, Yutaka Kojima, Kazuhiro Sakamoto
Nippon Daicho Komonbyo Gakkai Zasshi.2023; 76(3): 299. CrossRef
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Kyung Uk Jung, Hyung Ook Kim, Hungdai Kim, Donghyoun Lee, Chinock Cheong
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Clinical outcome of the Gant-Miwa-Thiersch procedure for colonic mucosal prolapse after intersphincteric resection—a single-center report from Japan
Toshikatsu Nitta, Masatsugu Ishii, Jun Kataoka, Sedakatsu Senpuku, Yasuhiko Ueda, Ryo Iida, Ayumi Matsutani, Takashi Ishibashi
Annals of Medicine and Surgery.2021; 72: 103005. CrossRef
Robotic Intersphincteric Resection for Low Rectal Cancer: Technical Controversies and a Systematic Review on the Perioperative, Oncological, and Functional Outcomes
Guglielmo Niccolò Piozzi, Seon Hahn Kim
Annals of Coloproctology.2021; 37(6): 351. CrossRef
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Original Articles

Malignant disease, Rectal cancer,Colorectal cancer,Surgical technique

The “reverse air leak test”: a new technique for the assessment of low colorectal anastomosis: Francesco Crafa, Augusto Striano, Francesco Esposito, Amalia Rosaria Rita Rossetti, Mario Baiamonte, Valeria Gianfreda, Antonio Longo; Ann Coloproctol. 2022;38(1):20-27. Published online December 4, 2020; DOI: https://doi.org/10.3393/ac.2020.09.21.1

7,950 View
235 Download
14 Web of Science
16 Citations

Abstract PDF

Purpose
Anastomotic leakage is a fearsome complication in rectal surgery. Surgeons perform the classic air leak test, although its real effectiveness is still debated. The aim of this study was to describe a personal technique of reverse air leak test in which low colorectal anastomosis was assessed transanally through the intrarectal irrigation of a few mL of saline solution.
Methods
From October 2014 to November 2019, 11 patients with low rectal cancer (type 1 in Roullier classification) were included in this study. At the beginning of the procedure, a circular anal dilator was inserted into the anus. A side-to-end colorectal anastomosis was performed. A few mL of saline solution were injected into the rectum and the entire anastomotic line was directly explored. The appearance of bubbles was considered as an anastomotic defect and repaired with an interrupted suture. A fluorescence angiography after intravenous injection of indocyanine green was performed in order to evaluate the perfusion of the anastomosis.
Results
The reverse air leak test was positive in 4 cases (36.4%). The defect was repaired and a confirmation test was performed. In all patients, near-infrared evaluation showed no perfusion defect (grade 0) in low colorectal anastomosis. No postoperative fistula was detected in cohort study. A protective stoma was performed in 10 patients. On day 90, there were no complications and stoma closure was performed as planned.
Conclusion
The reverse air leak test is a simple, feasible, and effective procedure to identify anastomotic leaks in low colorectal anastomoses.

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Majed Alanazi, Bandar Ali, Ibrahim Alonazi, Pierre Y Garneau , Denis Ronald, Radu Pescarus
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Francesco Cosentino, Alessio Colalillo, Claudia Tucci, Francesco Corbisiero, Daniele Neola, Diego Raimondo, Antonio Raffone
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Crafa Francesco, Vanella Serafino, Emanuele Caruso, Madoka Hamada, Nozomi Ueno
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Crafa Francesco, Vanella Serafino
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Chungyeop Lee, In Ja Park
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Treatment of anastomotic leak in colorectal surgery by endoluminal vacuum therapy with the VACStent avoiding a stoma - a pilot study
Markus M. Heiss, Jonas Lange, Judith Knievel, Alexander Yohannes, Ulrich Hügle, Arno J. Dormann, Claus F. Eisenberger
Langenbeck's Archives of Surgery.2024;[Epub] CrossRef
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Malik Takkal, Xavier Delgadillo, Amel Takkal, Sara Al-Maimouni
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Grekov's Bulletin of Surgery.2023; 181(6): 98. CrossRef
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Serafino Vanella, Enrico Coppola Bottazzi, Giancarlo Farese, Rosa Murano, Adele Noviello, Tommaso Palma, Maria Godas, Francesco Crafa
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Malignant disease, Rectal cancer,Prognosis and adjuvant therapy,Colorectal cancer,Epidemiology & etiology

Characteristics of Patients Presented With Metastases During or After Completion of Chemoradiation Therapy for Locally Advanced Rectal Cancer: A Case Series: Radwan Torky, Mohammed Alessa, Ho Seung Kim, Ahmed Sakr, Eman Zakarneh, Fozan Sauri, Heejin Bae, Nam Kyu Kim; Ann Coloproctol. 2021;37(3):186-191. Published online September 18, 2020; DOI: https://doi.org/10.3393/ac.2020.08.10.1

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Abstract PDF

Purpose
Locally advanced rectal cancer (LARC) is managed by chemoradiotherapy (CRT), followed by surgery. Herein we reported patients with metastases during or after CRT.
Methods
Data of patients with LARC who received CRT from 2008 to 2017 were reviewed. Patients with metastases after CRT were included. Those with metastatic tumors at the initial diagnosis were excluded.
Results
Fourteen patients (1.3%) of 1,092 who received CRT presented with metastases. Magnetic resonance circumferential resection margin (mrCRM) and mesorectal lymph nodes (LNs) were positive in 12 patients (85.7%). Meanwhile, magnetic resonance extramural vascular invasion (mrEMVI) was positive in 10 patients (71.4%). Magnetic resonance tumor regression grade (mrTRG) 4 and mrTRG5 was detected in 5 and 1 patient respectively. Ten patients (71.4%) underwent combined surgery and 3 (21.4%) received palliative chemotherapy.
Conclusion
Patients with metastases after CRT showed a higher rate of positive mrCRM, mrEMVI, mesorectal LNs, and poor tumor response. Further studies with a large number of patients are necessary for better survival outcomes in LARC.

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Unveiling the profound advantages of total neoadjuvant therapy in rectal cancer: a trailblazing exploration
Kyung Uk Jung, Hyung Ook Kim, Hungdai Kim, Donghyoun Lee, Chinock Cheong
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Advances in the Treatment of Colorectal Cancer with Peritoneal Metastases: A Focus on Cytoreductive Surgery and Hyperthermic Intraperitoneal Chemotherapy
Youngbae Jeon, Eun Jung Park
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Recent Advance in the Surgical Treatment of Metastatic Colorectal Cancer-An English Version
Eun Jung Park, Seung Hyuk Baik
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Update on Diagnosis and Treatment of Colorectal Cancer
Chan Wook Kim
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Malignant disease, Functional outcomes,Colorectal cancer

The Relationship Between High-Output Stomas, Postoperative Ileus, and Readmission After Rectal Cancer Surgery With Diverting Ileostomy: Naa Lee, Soo Young Lee, Chang Hyun Kim, Han Deok Kwak, Jae Kyun Ju, Hyeong Rok Kim; Ann Coloproctol. 2021;37(1):44-50. Published online September 18, 2020; DOI: https://doi.org/10.3393/ac.2020.08.03

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Abstract PDF

Purpose
This study aimed to evaluate the relationship between high-output stomas (HOSs), postoperative ileus (POI), and readmission after rectal cancer surgery with diverting ileostomy.
Methods
We included 302 patients with rectal cancer who underwent restorative resection with diverting ileostomy between January 2011 and December 2015. HOSs were defined as stomas with ≥ 2,000 mL/day output. We analyzed predictive factors for readmission of these patients.
Results
Forty-eight patients (15.9%) had HOSs during the hospital stay, and 41 patients (13.6%) experienced POI. HOSs were strongly associated with POI (45.8% vs. 7.5%, P < 0.001). The all-cause readmission rate was 16.9%, with 19 (6.3%) and 20 (6.6%) experiencing ileus and acute kidney injury, respectively. HOSs (27.1% vs. 15.0%, P = 0.040) and POI (34.1% vs. 14.2%, P = 0.002) were associated with all-cause readmission, and POI was associated with readmission with ileus (17.1% vs. 4.6%, P = 0.007). POI was an independent risk factor for all-cause readmission (adjusted odds ratio [OR], 2.640; 95% confidence interval [CI], 1.162 to 6.001; P = 0.020) and readmission with ileus (adjusted OR = 3.869; 95% CI 1.387 to 10.792; P = 0.010).
Conclusion
POI was associated with readmission, particularly for subsequent ileus, in patients with diverting ileostomy. We should make efforts to reduce POI, such as strong control of HOSs, to prevent readmission.

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High output stoma after surgery for rectal cancer - a risk factor for low anterior resection syndrome?
Xuena Zhang, Qingyu Meng, Jianna Du, Zhongtao Tian, Yinju Li, Bin Yu, Wenbo Niu
BMC Gastroenterology.2025;[Epub] CrossRef
Summary of Best Evidence for the Dietary Management in Patients with High-Output Ileostomy
Ying Wang, Hua Peng, Cui Cui, Qi Zou, Mudi Yang
Journal of Multidisciplinary Healthcare.2025; Volume 18: 877. CrossRef
Elevating surgical standards: The role of intraperitoneal isoperistaltic side-to-side anastomosis in colon cancer surgery
Sung Uk Bae
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Maximizing Readmission Reduction in Colon Cancer Patients
Mario Schootman, Chenghui Li, Jun Ying, Sonia T. Orcutt, Jonathan Laryea
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Analysis of decision-making factors for defunctioning ileostomy after rectal cancer surgery and their impact on perioperative recovery: a retrospective study of 1082 patients
Xiaojiang Yi, Huaguo Yang, Hongming Li, Xiaochuang Feng, Weilin Liao, Jiaxin Lin, Zhifeng Chen, Dechang Diao, Manzhao Ouyang
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Min Ki Kim
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Overall readmissions and readmissions related to dehydration after creation of an ileostomy: a systematic review and meta-analysis
I. Vogel, M. Shinkwin, S. L. van der Storm, J. Torkington, J. A.Cornish, P. J. Tanis, R. Hompes, W. A. Bemelman
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Malignant disease, Rectal cancer, Functional outcomes

Early and Late Functional Outcomes of Anal Sphincter-Sparing Procedures With Total Mesorectal Excision for Anorectal Adenocarcinoma: Osama Eldamshety, Sherif Kotb, Ashraf Khater, Sameh Roshdy, Mohamed Elashry, Mohamed S. Zahi, Hend M. Hamdey Rashed Elkalla, Waleed Elnahas, Omar Farouk, Adel Fathi, Ahmed Senbel, Emad-Eldeen Hamed, Khaled Abdelwahab, Islam Abdou Elzahby, Ahmed abdallah, Mahmoud Abdelaziz, Emanuele Lezoche; Ann Coloproctol. 2020;36(3):148-154. Published online April 20, 2020; DOI: https://doi.org/10.3393/ac.2018.07.19

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Abstract PDF

Background
The study aims to assess the functional outcome of anal sphincter sparing procedures (SSP) with TME for anorectal adenocarcinoma.
Methods
In a multicentric, prospective, single-group study in the period between December 2012 and November 2017, 93 patients presented with anorectal adenocarcinoma were included in the study. Sixty-nine patients underwent SSP with TME. SSP included the combined approach of transabdominal TME with intersphincteric resection (ISR) or transanal transabdominal TME (TATA). Using the Per Anal Examination Scoring System (PASS), postoperative anal function was assessed after one year.
Results
Bowel motility time was 50 (±19) hours. The time needed for narcotic analgesia was 54 (±18.8) hours. Mean hospital stay was 15.4 (±10.25) days. Incidence of evident fecal incontinence after ISR is 10.6% (7/67 cases). The Per Anal Examination Scoring System (PASS) findings of 69 cases are as follows: extremely hypotonic 8.6% (6 cases), slightly hypotonic 26.1% (18 cases), normal tone 58% (40 cases), slightly stenotic 3 cases (4.3%), or occluded 2.9% (2 cases). Urinary dysfunction occurred in one case (1.4%). Temporary diversion was performed in 61 patients (87.1%).
Conclusion
Sphincter preservation with TME for anorectal adenocarcinoma helps avoid permanent stoma and provides a reasonable functional outcome. PASS is a new application for postoperative assessment of anal function

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Transanal Minimally Invasive TME (TaTME) Versus Non-Endoscopic Transanal Intersphincteric Resection of Post-Neoadjuvant Ultralow Rectal Adenocarcinoma: A Multicentric, Matched Case–Control Study
Osama Eldamshety, Mohamed Abdekhalek, Amir M. Zaid, Essam Attia, Mohamed Zuhdy, Emanuel Lezoche, Giovanni Lezoche, Enjy Mosaad, Marwa Abogabal, Islam Elzahby
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Pathologic Implications of Magnetic Resonance Imaging-detected Extramural Venous Invasion of Rectal Cancer
Hyun Gu Lee, Chan Wook Kim, Jong Keon Jang, Seong Ho Park, Young Il Kim, Jong Lyul Lee, Yong Sik Yoon, In Ja Park, Seok-Byung Lim, Chang Sik Yu, Jin Cheon Kim
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Chan Wook Kim
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Low Anterior Resection Syndrome: Pathophysiology, Risk Factors, and Current Management
Seung Mi Yeo, Gyung Mo Son
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Sung Uk Bae
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Chungyeop Lee, Jong Lyul Lee
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Athina A. Samara, Ioannis Baloyiannis, Konstantinos Perivoliotis, Dimitrios Symeonidis, Alexandros Diamantis, Konstantinos Tepetes
International Journal of Colorectal Disease.2021; 36(7): 1385. CrossRef
Robotic Intersphincteric Resection for Low Rectal Cancer: Technical Controversies and a Systematic Review on the Perioperative, Oncological, and Functional Outcomes
Guglielmo Niccolò Piozzi, Seon Hahn Kim
Annals of Coloproctology.2021; 37(6): 351. CrossRef
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Eun Jung Park, Seung Hyuk Baik
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Simplification or Accuracy: In Assessing Functional Outcomes After Intersphincteric Resection for Low Rectal Cancer
Kyung Jong Kim
Annals of Coloproctology.2020; 36(3): 129. CrossRef

Malignant disease, Rectal cancer

First Feasibility Study and Short-term Outcomes of Laparoscopic-Assisted Anterior Resection in Colorectal Cancer in Malaysia: Henry Chor Lip Tan, Jih Huei Tan, Nur Akmalrudin Nur Dzainuddin, Koon Khee Chan; Ann Coloproctol. 2020;36(2):94-101. Published online March 16, 2020; DOI: https://doi.org/10.3393/ac.2019.05.10

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Abstract PDF

Purpose
The purpose of this study was to demonstrate the feasibility and safety of laparoscopic-assisted anterior resection (LAAR) for colorectal cancer in a local Asian population.
Methods
This is a retrospective review of all patients with colorectal cancer operated from November 2017 to October 2018. Main variables of interest were demography, type and surgery, length of stay (LOS), and the involvement of proximal and distal doughnut. Postoperative complications were analysed using chi-square or Fisher exact and Mann-Whitney tests.
Results
There were 23 patients with a mean age of 62.5 ± 12.2 years. The mean time from diagnosis to surgery was 97.1 ± 154.84 days. There were 12 patients in the LAAR group and 11 in the open anterior resection (OAR) group. Duration of surgery was shorter in OAR (129.58 ± 51.38 minutes) compared to LAAR (147.91 ± 39.37 minutes). Mean LOS was shorter in the LAAR group with 5±1.5 days compared to the OAR group of 7.42 ± 4.25 days. However, there was no significant P-value for both duration of surgery (P = 0.322) or LOS (P = 0.87). A total of 3 complications were recorded after OAR and 2 after LAAR. Both groups had clear proximal and distal margins with 16 (12–18.5) harvested lymph nodes in LAAR and 18 (16–22) in OAR, which were equal (P = 0.155).
Conclusion
This study reports a shorter LOS in the minimally invasive group of 2 days with similar oncologic resection outcomes. This shows that LAAR is feasible in Malaysia and has potential outcome benefits.

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Short-Term Surgical Outcomes of Curative Colorectal Resections from an Evolving Low-Volume Cancer Center in a Tier-2 City in India
Vishnu S. Menon, Amita Sekhar Padhy, Rigved Nittala, Mounika Basani, Sidaksingh R. Arora
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Five-year follow-up retrospective review of colorectal cancer patients in Johor Bahru
Jih Huei Tan, Hoo Zhi Ai, Keith Tan Jian Li, Lai Yong Sheng, Anoopurany Subramaniam, Aishath Rahy Abdul Latheef, Cheah Suang Yao, Kelly Loo Kai Li, Ian Chiew Juin Liang, Raymond Lim Zhun Ming, Henry Tan Chor Lip, Koon Khee Chan
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Perforated caecal carcinoma within a strangulated inguinal hernia
Wick Champ Lai, Mogaraj Sellapan, Novinth Kumar Raja Ram, Henry Tan Chor Lip
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Low Anterior Resection Syndrome: Pathophysiology, Risk Factors, and Current Management
Seung Mi Yeo, Gyung Mo Son
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Critical adjustments and trauma surgery trends in adaptation to COVID-19 pandemic in Malaysia
Henry Tan Chor Lip, Tan Jih Huei, Yuzaidi Mohamad, Rizal Imran Alwi, Tuan Nur' Azmah Tuan Mat
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Malignant disease, Rectal cancer, Functional outcomes

Validation of Korean Version of Low Anterior Resection Syndrome Score Questionnaire: Chang Woo Kim, Woon Kyung Jeong, Gyung Mo Son, Ik Yong Kim, Ji Won Park, Seung-Yong Jeong, Kyu Joo Park, Suk-Hwan Lee; Ann Coloproctol. 2020;36(2):83-87. Published online February 11, 2020; DOI: https://doi.org/10.3393/ac.2019.08.01

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Abstract PDF

Purpose
Patients who undergo radical surgery for rectal cancer often experience low anterior resection syndrome (LARS). Symptoms of this syndrome include frequent bowel movements, gas incontinence, fecal incontinence, fragmentation, and urgency. The aim of this study was to investigate the convergent validity, discriminative validity, and reliability of the Korean version of the LARS score questionnaire.
Methods
The English LARS score questionnaire was translated into Korean using the forward-and-back translation method. A total of 146 patients who underwent radical surgery for rectal cancer answered the Korean version of the LARS score questionnaire including an anchor question assessing the impact of bowel function. Participants answered the questionnaire once more after 2 weeks.
Results
The Korean LARS score questionnaire showed high convergent validity in terms of high correlation between the LARS score and quality of life (perfect fit 55.5% vs. moderate fit 37.6% vs. no fit 6.8%, respectively; P < 0.001). The LARS score also showed good discriminative validity between groups of patients differing by sex (29 for males vs. 25 for females; P = 0.014), tumor level (29 for ≤8 cm vs. 24 for >8 cm; P = 0.021), and radiotherapy (32 for yes vs. 24 for no; P = 0.001). The LARS score also demonstrated high reliability at test-retest with no difference between scores at the first and second tests (intraclass correlation coefficient: Q1 = 0.932; Q2 = 0.909, Q3 = 0.944, Q4 = 0.931, and Q5 = 0.942; P < 0.001, respectively).
Conclusion
The Korean version of the LARS score questionnaire has proven to be a valid and reliable tool for measuring LARS in Korean patients with rectal cancer.

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Impact of sleep disturbances due to low anterior resection syndrome on the quality of life of patients with rectal cancer
Do Kyoon Moon, Seung-Bum Ryoo, Mi Suk Kim, Jae Hyun Park, Jesung Park, Jong Sung Ahn, Hyo Jun Kim, Minjung Kim, Ji Won Park, Seung-Yong Jeong, Kyu Joo Park
The American Journal of Surgery.2025; 246: 116399. CrossRef
Validation of the Vietnamese version of the low anterior resection syndrome score questionnaire
Tuong-Anh Mai-Phan, Vu Quang Pham
Annals of Coloproctology.2024; 40(6): 588. CrossRef
Bowel dysfunction and lower urinary tract symptoms on quality of life after sphincter-preserving surgery for rectal cancer: A cross-sectional study
Hyekyung Kim, Hyedan Kim, Ok-Hee Cho
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Inah Kim, Ji Young Lim, Sun Woo Kim, Dong Wook Shin, Hee Cheol Kim, Yoon Ah Park, Yoon Suk Lee, Jung-Myun Kwak, Seok Ho Kang, Ji Youl Lee, Ji Hye Hwang
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Low anterior resection syndrome
Seung‐Bum Ryoo
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Min Jung Kim, Dae Won Lee, Hyun-Cheol Kang, Ji Won Park, Seung-Bum Ryoo, Sae-Won Han, Kyung Su Kim, Eui Kyu Chie, Jae Hwan Oh, Woon Kyung Jeong, Byoung Hyuck Kim, Eun Mi Nam, Seung-Yong Jeong
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Kelly C.L.R. Buzatti, Andy Petroianu, Søren Laurberg, Rodrigo G. Silva, Beatriz D.S. Rodrigues, Peter Christensen, Antonio Lacerda-Filho, Therese Juul
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Preoperative sequential short-course radiation therapy and FOLFOX chemotherapy versus long-course chemoradiotherapy for locally advanced rectal cancer: a multicenter, randomized controlled trial (SOLAR trial)
Min Kyu Kang, Soo Yeun Park, Jun Seok Park, Hye Jin Kim, Jong Gwang Kim, Byung Woog Kang, Jin Ho Baek, Seung Hyun Cho, An Na Seo, Duck-Woo Kim, Jin Kim, Se Jin Baek, Ji Hoon Kim, Ji Yeon Kim, Gi Won Ha, Eun Jung Park, In Ja Park, Chang Hyun Kim, Hyun Kang
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Clinical Implication of Lateral Pelvic Lymph Node Metastasis in Rectal Cancer Treated with Neoadjuvant Chemoradiotherapy
In Ja Park
The Ewha Medical Journal.2022; 45(1): 3. CrossRef
Low Anterior Resection Syndrome: Pathophysiology, Risk Factors, and Current Management
Seung Mi Yeo, Gyung Mo Son
The Ewha Medical Journal.2022;[Epub] CrossRef
Analgesic effect of structured anal skin care for perianal dermatitis after low anterior resection in the rectal cancer patients: prospective, single-center, open-label, therapeutic confirmatory, randomized clinical trial
Gyung Mo Son, In Young Lee, Mi Sook Yun, Jung-Hea Youn, Hong Min An, Kyung Hee Kim, Seung Mi Yeo, Bokyung Ku, Myeong Suk Kwon, Kun Hyung Kim
Annals of Surgical Treatment and Research.2022; 103(6): 360. CrossRef
Two dominant patterns of low anterior resection syndrome and their effects on patients’ quality of life
Min Jung Kim, Ji Won Park, Mi Ae Lee, Han-Ki Lim, Yoon-Hye Kwon, Seung-Bum Ryoo, Kyu Joo Park, Seung-Yong Jeong
Scientific Reports.2021;[Epub] CrossRef
Anterior resection syndrome: a randomized clinical trial of a 5-HT3 receptor antagonist (ramosetron) in male patients with rectal cancer
S -B Ryoo, J W Park, D W Lee, M A Lee, Y -H Kwon, M J Kim, S H Moon, S -Y Jeong, K J Park
British Journal of Surgery.2021; 108(6): 644. CrossRef
The incidence and risk factors of low anterior resection syndrome (LARS) after sphincter-preserving surgery of rectal cancer: a systematic review and meta-analysis
Rui Sun, Ziyi Dai, Yin Zhang, Junyang Lu, Yuelun Zhang, Yi Xiao
Supportive Care in Cancer.2021; 29(12): 7249. CrossRef
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Dr Rebekka Troller, Dr Jeremy Meyer, Mr Justin Davies
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Sungjin Kim, Sung Il Kang, So Hyun Kim, Jae-Hwang Kim
Annals of Coloproctology.2021; 37(5): 281. CrossRef
Robotic Intersphincteric Resection for Low Rectal Cancer: Technical Controversies and a Systematic Review on the Perioperative, Oncological, and Functional Outcomes
Guglielmo Niccolò Piozzi, Seon Hahn Kim
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Eun Jung Park, Seung Hyuk Baik
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Malignant disease, Rectal cancer,Prognosis and adjuvant therapy

Effect of Age on Laparoscopic Surgery and Postoperative Chemotherapy in Elderly Patients With Colorectal Cancer: Hyun Hee Kim, Myong Hoon Ihn, Yun Hee Lee, Jihyoun Lee, Sangchul Yun, Sung Woo Cho; Ann Coloproctol. 2020;36(4):229-242. Published online January 31, 2020; DOI: https://doi.org/10.3393/ac.2019.10.03

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Abstract PDF Supplementary Material

Purpose
We aimed to evaluate the postoperative complications of laparoscopic colorectal cancer (CRC) surgery and the adverse events of postoperative chemotherapy in elderly patients compared to younger patients and to identify the factors influencing the termination of postoperative chemotherapy.
Methods
Between June 2015 and May 2018, 188 patients with CRC underwent laparoscopic surgery with curative intent. Patients aged ≥ 70 were defined as elderly. Postoperative complications and adverse events of chemotherapy were assessed by using the Clavien-Dindo classification and the Common Terminology Criteria for Adverse Events, respectively. The clinicopathological factors were analyzed retrospectively.
Results
Seventy-eight patients were considered elderly with a mean age of 77.5 ± 5.5 years. Overall postoperative complications occurred in 68 patients (36.2%). Age and primary tumor location were independent predictors of overall postoperative complications. Smoking history was the only independent predictor of major postoperative complications. Of 113 patients who were recommended postoperative chemotherapy, 90 patients (79.6%) received postoperative chemotherapy. Overall adverse events occurred in 40 patients (44.4%). The American Society of Anesthesiologists physical status classification and chemotherapy regimen were significantly associated with overall adverse events. The chemotherapy regimen was the only factor significantly associated with severe adverse events. Of 90 patients, postoperative chemotherapy could not be completed in 11 (12.2%). Age was the only factor significantly associated with stopping postoperative chemotherapy (P = 0.003).
Conclusion
This study shows that laparoscopic CRC surgery and postoperative chemotherapy were feasible in elderly patients. Further efforts are needed to ensure that elderly patients have the opportunity to make informed decisions regarding postoperative chemotherapy.

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Ellen Van Eetvelde, Manu Verweirder, Lore Decoster, Daniel Jacobs-Tulleneers-Thevissen
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Review

A Review of the Role of Carcinoembryonic Antigen in Clinical Practice: Claire Hall, Louise Clarke, Atanu Pal, Pamela Buchwald, Tim Eglinton, Chris Wakeman, Frank Frizelle; Ann Coloproctol. 2019;35(6):294-305. Published online December 31, 2019; DOI: https://doi.org/10.3393/ac.2019.11.13

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Abstract PDF

Carcinoembryonic antigen (CEA) is not normally produced in significant quantities after birth but is elevated in colorectal cancer. The aim of this review was to define the current role of CEA and how best to investigate patients with elevated CEA levels. A systematic review of CEA was performed, in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Studies were identified from PubMed, Cochrane library, and controlled trials registers. We identified 2,712 papers of which 34 were relevant. Analysis of these papers found higher preoperative CEA levels were associated with advanced or metastatic disease and thus poorer prognosis. Postoperatively, failure of CEA to return to normal was found to be indicative of residual or recurrent disease. However, measurement of CEA levels alone was not sufficient to improve survival rates. Two algorithms are proposed to guide investigation of patients with elevated CEA: one for patients with elevated CEA after CRC resection, and another for patients with de novo elevated CEA. CEA measurement has an important role in the investigation, management and follow-up of patients with colorectal cancer.

Citations

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Original Articles

Immunological Differences Between Right-Sided and Left-Sided Colorectal Cancers: A Comparison of Embryologic Midgut and Hindgut: Han Deok Kwak, Jae Kyun Ju; Ann Coloproctol. 2019;35(6):342-346. Published online December 31, 2019; DOI: https://doi.org/10.3393/ac.2019.03.17.1

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Abstract PDF

Purpose
There are known differences in embryology, clinical symptoms, incidences, molecular pathways involved, and oncologic outcomes of right-sided and left-sided colorectal cancers. However, immunologic study has only been characterized for healthy adults. The present study was designed to identify differences in immune cell populations in patients with right-sided and left-sided colorectal cancers.
Methods
A total of 35 patients who underwent colorectal resection for cancer between November 2016 and August 2017 at a tertiary teaching hospital were enrolled in this study. Patients were excluded if they had a disease affecting their immune system. Populations of immune cells, including mucosal-associated invariant T (MAIT), gamma delta T, invariant natural killer T, T, natural killer, and B cells, were measured in the peripheral blood and cancer tissues using flow cytometry, and then assessed based on the origin of the colorectal cancer.
Results
Fifteen had right-side and 20 had left-side colorectal cancer. There were no significant differences between the 2 cohorts for patient characteristics including pathologic stage. Peripheral blood from patients with right-side colon cancers contained fewer MAIT (0.87% right-side vs. 1.74% left-side, P = 0.028) and gamma delta T cells (1.10% right-side vs. 3.05% left-side, P = 0.002). Although the group with right-side colorectal cancer had more MAIT cells in cancer tissues (1.71% vs. 1.00%), this difference was not statistically significant.
Conclusion
There is a difference in population sizes of immune cells in blood between patients with right-sided and leftsided colon cancers. The immune cell composition was determined to be distinct based on embryologic origin.

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Alimohammad Bananzadeh, Sara Shojaei-Zarghani, Amir Reza Bahadori, Ali Reza Safarpour
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A. A. Kiblitskaya, A. Y. Maksimov, A. S. Goncharova, Ye. M. Nepomnyashchaya, Ye. Y. Zlatnik, G. Y. Yegorov, Ye. A. Lukbanova, Ye. V. Zaikina, A. V. Volkova
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Malignant disease, Prognosis and adjuvant therapy

Long-term Oncologic Outcome of Postoperative Complications After Colorectal Cancer Surgery: Chang Kyu Oh, Jung Wook Huh, You Jin Lee, Moon Suk Choi, Dae Hee Pyo, Sung Chul Lee, Seong Mun Park, Jung Kyong Shin, Yoon Ah Park, Yong Beom Cho, Seong Hyeon Yun, Hee Cheol Kim, Woo Yong Lee; Ann Coloproctol. 2020;36(4):273-280. Published online November 13, 2019; DOI: https://doi.org/10.3393/ac.2019.10.15

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Abstract PDF

Purpose
The impact of postoperative complications on long-term oncologic outcome after radical colorectal cancer surgery is controversial. The aim of this study was to examine the risk factors and oncologic outcomes of surgery-related postoperative complication groups.
Methods
From January 2010 to December 2010, 310 patients experienced surgery-related postoperative complications after radical colorectal cancer surgery. These stage I–III patients were classified into 2 subgroups, minor (grades I, II) and major (grades III, IV) complication groups, according to extended Clavien-Dindo classification system criteria. Clinicopathologic differences between the 2 groups were analyzed to identify risk factors for major complications. The diseasefree survival rates of surgery-related postoperative complication groups were also compared.
Results
Minor and major complication groups were stratified with 194 patients (62.6%) and 116 patients (37.4%), respectively. The risk factors influencing the major complication group were pathologic N category and operative method. The prognostic factors associated with disease-free survival were preoperative perforation, perineural invasion, tumor budding, and receiving neoadjuvant therapy. With a median follow-up period of 72.2 months, the 5-year disease-free survival rates were 84.4% in the minor group and 78.5% in the major group, but there was no statistical significance between the minor and major groups (P = 0.392).
Conclusion
Advanced cancer and open surgery were identified as risk factors for increased surgery-related major complications after radical colorectal cancer surgery. However, severity of postoperative complications did not affect disease-free survival from colorectal cancer.

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Sentinel Lymph Node Analysis in Colorectal Cancer Patients Using One-Step Nucleic Acid Amplification in Combination With Fluorescence and Indocyanine Green: Francesco Esposito, Adele Noviello, Nicola Moles, Enrico Coppola Bottazzi, Mario Baiamonte, Ina Macaione, Umberto Ferbo, Maria Lepore, Antonio Miro, Francesco Crafa; Ann Coloproctol. 2019;35(4):174-180. Published online August 31, 2019; DOI: https://doi.org/10.3393/ac.2018.07.21.1

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Abstract PDF

Purpose
Analysis of the sentinel lymph node (SLN) in colorectal cancer (CRC) patients was proposed for more accurate staging and tailored lymphadenectomy. The aim of this study was to assess the ability to predict lymph node (LN) involvement through analysis of the SLN with a one-step nucleic acid (OSNA) technique in combination with peritumoral injection of indocyanine green (ICG) and near-infrared (NIR) lymphangiography in CRC patients.
Methods
A total of 34 patients were enrolled. Overall, 51 LNs were analyzed with OSNA. LNs of 17 patients (50%) were examined simultaneously with hematoxylin and eosin (H&E) and OSNA.
Results
SLN analysis of 17 patients examined with H&E and OSNA revealed that OSNA had a higher sensitivity (1 vs. 0.55), higher negative predictive value (1 vs. 0.66) and higher accuracy (100% vs. 76.4%) in predicting LN involvement. Overall, OSNA showed a sensitivity of 0.69, specificity of 1, accuracy of 88.2%, and stage migration of 8.8%. Compared to those who were OSNA (−), OSNA (+) patients had a greater number of LN metastases (4.8 vs. 0.16, P = 0.04), higher G3 rate (44.4% vs. 4%, P = 0.01), more advanced stage of disease (stage III: 77.8% vs. 16%; P = 0.00) and were more rapidly subjected to adjuvant chemotherapy (39.1 days vs. 50.2 days, P = 0.01).
Conclusion
SLN analysis with OSNA in combination with ICG-NIR lymphangiography is feasible and can detect LN involvement in CRC patients. Furthermore, it allows for more accurate staging reducing the delay between surgery and adjuvant chemotherapy.

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Ke Li, Min Meng, Weiwei Zhang, Junyi Li, Yiting Wang, Changhui Zhou
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Review

How to Achieve a Higher Pathologic Complete Response in Patients With Locally Advanced Rectal Cancer Who Receive Preoperative Chemoradiation Therapy: Suk-Hwan Lee; Ann Coloproctol. 2019;35(1):3-8. Published online February 28, 2019; DOI: https://doi.org/10.3393/ac.2019.02.17

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The current standard of care for treating patients with locally advanced rectal cancer includes preoperative chemoradiation therapy (PCRT) followed by a total mesorectal excision and postoperative adjuvant chemotherapy. A subset of these patients has achieved a pathologic complete response (pCR) and they have shown improved disease-free and overall survival compared to non-pCR patients. Thus, many efforts have been made to achieve a higher pCR through PCRT. In this review, results from various ongoing and recently completed clinical trials that are being or have been conducted with an aim to improve tumor response by modifying therapy will be discussed.

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David M McDermott, Sarah A Singh, Paul B Renz, Shaakir Hasan, Josh Weir
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Can Pretreatment Blood Biomarkers Predict Pathological Response to Neoadjuvant Chemoradiotherapy in Patients with Locally Advanced Rectal Cancer?
Marina Morais, Telma Fonseca, Raquel Machado-Neves, Mrinalini Honavar, Ana Rita Coelho, Joanne Lopes, Elisabete Barbosa, Emanuel Guerreiro, Silvestre Carneiro
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Aijie Li, Kewen He, Dong Guo, Chao Liu, Duoying Wang, Xiangkui Mu, Jinming Yu
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Original Articles

Transanal Tube Drainage as a Conservative Treatment for Anastomotic Leakage Following a Rectal Resection: Mostafa Shalaby, Waleed Thabet, Oreste Buonomo, Nicola Di Lorenzo, Mosaad Morshed, Giuseppe Petrella, Mohamed Farid, Pierpaolo Sileri; Ann Coloproctol. 2018;34(6):317-321. Published online December 20, 2018; DOI: https://doi.org/10.3393/ac.2017.10.18

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Abstract PDF

Purpose
We evaluate the role of transanal tube drainage (TD) as a conservative treatment for patients with anastomotic leakage (AL).
Methods
Patients treated for AL who had undergone a low or an ultralow anterior resection with colorectal or coloanal anastomosis for the treatment of rectal cancer between January 2013 and January 2017 were enrolled in this study. The data were collected prospectively and analyzed retrospectively. The primary outcomes were the diagnosis and the management of AL.
Results
Two hundred thirteen consecutive patients, 122 males and 91 females, were included. The mean age was 66.91 ± 11.15 years, and the median body mass index was 24 kg/m2 (range, 20–35 kg/m2 ). The median tumor distance from the anal verge was 8 cm (range, 4–12 cm). Ninety-three patients (44%) received neoadjuvant therapy for nodal disease and/or locally advanced rectal cancer. Only 13 patients (6%) developed AL. Six patients developed subclinical AL as they had a defunctioning ileostomy at the time of the initial procedure. They were treated conservatively with TD under endoscopic guidance in the endoscopy unit and received intravenous antibiotics. Six weeks after discharge, these 6 patients underwent follow-up flexible sigmoidoscopy which showed a completely healed anastomotic defect with no residual stenosis. Seven patients developed a clinically significant AL and required reoperation with pelvic abscess drainage and Hartmann colostomy formation.
Conclusion
These results suggest that TD for management of patients with AL is safe, cheap, and effective. Salvaging the anastomosis will help decrease the need for Hartmann colostomy formation. Proper patient selection is important.

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A Review of Postoperative Complications in Colon Cancer Surgery: The Need for Patient-Centered Therapy
Adrian Silaghi, Dragos Serban, Corneliu Tudor, Bogdan Mihai Cristea, Laura Carina Tribus, Irina Shevchenko, Alexandru Florin Motofei, Crenguta Sorina Serboiu, Vlad Denis Constantin
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Management of anastomotic leakage after low anterior resection with double-stapling anastomosis
Kenji Kawada, Yoshiro Itatani, Kazutaka Obama
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Challenges in the interdisciplinary treatment of leakages after left-sided colorectal surgery: endoscopic negative pressure therapy, open-pore film drainage therapy and beyond
Pasquale Scognamiglio, Anja Seeger, Matthias Reeh, Nathaniel Melling, Karl F Karstens, Thomas Rösch, Jakob R Izbicki, Marcus Kantowski, Michael Tachezy
International Journal of Colorectal Disease.2023;[Epub] CrossRef
Significance of information obtained during transanal drainage tube placement after anterior resection of colorectal cancer
Yuki Okazaki, Masatsune Shibutani, Hisashi Nagahara, Tatsunari Fukuoka, Yasuhito Iseki, En Wang, Kiyoshi Maeda, Kosei Hirakawa, Masaichi Ohira, Zubing Mei
PLOS ONE.2022; 17(8): e0271496. CrossRef
The usefulness of transanal tube for reducing anastomotic leak in mid rectal cancer: compared to diverting stoma
Seok Hyeon Cho, In Kyu Lee, Yoon Suk Lee, Min Ki Kim
Annals of Surgical Treatment and Research.2021; 100(2): 100. CrossRef
Treatment Modalities for Anastomotic Leakage in Rectal Cancer Surgery
Deborah S. Keller, K. Talboom, C.P.M van Helsdingen, Roel Hompes
Clinics in Colon and Rectal Surgery.2021; 34(06): 431. CrossRef
Retrospective study of active drainage in the management of anastomotic leakage after anterior resection for rectal cancer
Xiaojie Tan, Mei Zhang, Lai Li, He Wang, Xiaodong Liu, Haitao Jiang
Journal of International Medical Research.2021;[Epub] CrossRef
Improved colorectal anastomotic leakage healing by transanal rinsing treatment after endoscopic vacuum therapy using a novel patient-applied rinsing catheter
Marcus Kantowski, Andreas Kunze, Eugen Bellon, Thomas Rösch, Utz Settmacher, Michael Tachezy
International Journal of Colorectal Disease.2020; 35(1): 109. CrossRef
Surgical complications in colorectal cancer patients
Haleh Pak, Leila Haji Maghsoudi, Ali Soltanian, Farshid Gholami
Annals of Medicine and Surgery.2020; 55: 13. CrossRef
Effect comparison of three different types of transanal drainage tubes after anterior resection for rectal cancer
Yun Luo, Chang-Kang Zhu, Ding-Quan Wu, Liang-Bi Zhou, Chong-Shu Wang
BMC Surgery.2020;[Epub] CrossRef
Percutaneous transesophageal gastro-tubing for the management of anastomotic leakage after upper GI surgery: a report of two clinical cases
Yutaka Tamamori, Katsunobu Sakurai, Naoshi Kubo, Ken Yonemitsu, Yasuhiro Fukui, Junya Nishimura, Kiyoshi Maeda, Yukio Nishiguchi
Surgical Case Reports.2020;[Epub] CrossRef
Long-Term Results after Anastomotic Leakage following Rectal Cancer Surgery: A Comparison of Treatment with Endo-Sponge and Transanal Irrigation
Alice Weréen, Martin Dahlberg, Göran Heinius, Emil Pieniowski, Deborah Saraste, Karolina Eklöv, Jonas Nygren, Klas Pekkari, Åsa H. Everhov
Digestive Surgery.2020; 37(6): 456. CrossRef
Preventive strategies for anastomotic leakage after colorectal resections: A review
Mostafa Shalaby, Waleed Thabet, Mosaad Morshed, Mohamed Farid, Pierpaolo Sileri
World Journal of Meta-Analysis.2019; 7(8): 389. CrossRef
Transanal surgery: A tool in colorectal anastomotic leakage
Pere Planellas Giné, Júlia Gil Garcia, Ramon Farrés Coll, Antoni Codina Cazador
Cirugía Española (English Edition).2019; 97(10): 590. CrossRef
La cirugía transanal como herramienta en la dehiscencia de la anastomosis colorrectal
Pere Planellas Giné, Júlia Gil Garcia, Ramon Farrés Coll, Antoni Codina Cazador
Cirugía Española.2019; 97(10): 590. CrossRef

Clinical Outcomes of a Redo for a Failed Colorectal or Coloanal Anastomosis: In Teak Woo, Jun Seok Park, Gyu-Seog Choi, Soo Yeun Park, Hye Jin Kim, In Kyu Park; Ann Coloproctol. 2018;34(5):259-265. Published online October 31, 2018; DOI: https://doi.org/10.3393/ac.2018.05.04

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Purpose
Redo surgery in patients with a persistent anastomotic failure (PAF) is a rare procedure, and data about this procedure are lacking. This study aimed to evaluate the surgical outcomes of redo surgery in such patients.
Methods
Patients who underwent a redo anastomosis for PAF from January 2004 to November 2016 were retrospectively evaluated. Data from a prospective colorectal database were analyzed. Success was defined as the combined absence of any anastomosis-related complications and a stoma at the last follow-up.
Results
A total of 1,964 patients who underwent curative surgery for rectal cancer during this study period were included. Among them, 32 consecutive patients underwent a redo anastomosis for PAF. Thirteen patients of those 32 had major anastomotic dehiscence with a pelvic sinus, 12 had a recto-vaginal fistula, and 7 had anastomosis stenosis. There were no postoperative deaths. The median operation time was 255 minutes (range, 80–480 minutes), and the median blood loss was 80 mL (range, 30–1,000 mL). The overall success rate was 78.1%, and the morbidity rate was 40.6%. Multivariable analyses showed that the primary tumor height at the lower level was the only statistically significant risk factor for redo surgery (P = 0.042; hazard ratio, 2.444).
Conclusion
In our experience, a redo anastomosis is a feasible surgical option that allows closure of a stoma in nearly 80% of patients. Lower tumor height (<5 cm from the anal verge) is the only independent risk factor for nonclosure of defunctioning stomas after primary rectal surgery.

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Review

Intersphincteric Resection for Patients With Low-Lying Rectal Cancer: Oncological and Functional Outcomes: In Ja Park, Jin Cheon Kim; Ann Coloproctol. 2018;34(4):167-174. Published online August 31, 2018; DOI: https://doi.org/10.3393/ac.2018.08.02

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Abstract PDF

The aim of this review is to evaluate the outcomes after an intersphincteric resection (ISR) for patients with low-lying rectal cancer. Reports published in the literature regarding surgical, oncological, and functional outcomes of an ISR were reviewed. The morbidity after an ISR was 7.7%–32%, and anastomotic leakage was the most common adverse event. Local recurrence rates ranged from 0% to 12%, 5-year overall survival rates ranged from 62% to 92%, and rates of major incontinence ranged from 0% to 25.8% after an ISR. An ISR is a safe procedure for sphincter-saving rectal surgery in patients with very low rectal cancer; it does not compromise the oncological outcomes of the resection and is a valuable alternative to an abdominoperineal resection. While the functional outcomes after an ISR were found to be acceptable, the long-term functional outcome and quality of life still require careful investigation. ISRs have been performed with surgical and oncologic safety on patients with low-lying rectal cancer. However, patients must be selected very carefully for an ISR, considering the associated functional derangement and the limited extent of the resection.

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Original Articles

Gland Attenuation, a Novel Morphological Feature of Colorectal Cancer: Evidence for an Epithelial-Mesenchymal Transition: Tae-Hwa Baek, Dong-Wook Kang, Joo-Heon Kim, Hyun-Jin Son; Ann Coloproctol. 2018;34(4):187-196. Published online August 31, 2018; DOI: https://doi.org/10.3393/ac.2017.12.02

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Abstract PDF

Purpose
Along the invasive margin, colorectal cancer may show distinctive morphologic changes characterized by an asymmetrically attenuating tumor gland with loss of polarity. The author coined the term ‘gland attenuation (GA)’ for these peculiar changes. The aims of this study were to compare the immunoreactivity of the epithelial-mesenchymal transition (EMT) markers E-cadherin and β-catenin and thus determine whether EMTs occurs at tumor budding (TB) or GA sites and to assess the association of TB and/or GA levels with clinicopathological parameters and prognosis.
Methods
Expression patterns of E-cadherin and β-catenin in the tumor centers at GA and TB sites were examined in 101 patients with well or moderately differentiated CRCs, and the prognostic significance of TB and/or GA was statistically evaluated.
Results
GA foci, as well as TB foci, revealed loss of membranous and cytoplasmic E-cadherin expressions and aberrant β-catenin expression with reduced membranous expression and increased localization to the nucleus, suggesting that EMTs occur in GA as well as in TB. The high-TB and the TB-dominant groups were significantly correlated with advanced invasion depth, presence of lymph node metastasis, advanced pathologic staging and presence of lymphovascular invasion. The high-TB and the TB-dominant groups showed poor overall survival (OS) and recurrence-free survival (RFS), and high TB was an independent prognostic factor in the multivariate analyses for OS and RFS.
Conclusion
This study showed evidence that EMTs occurs at GA sites as well as TB foci. TB is a strong and independent prognostic factor, and TB-dominance may be an indicator of adverse clinical outcome.

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Tumor budding as a potential prognostic marker in determining the behavior of primary liver cancers
Betul Unal, Mennan Yigitcan Celik, Elif Ocak Gedik, Cumhur Ibrahim Bassorgun, Gulsum Ozlem Elpek
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Wei Xin, Chaoran Zhao, Longyang Jiang, Dongmei Pei, Lin Zhao, Chengpu Zhang
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Shinya Neri, Toshi Menju, Terumasa Sowa, Yojiro Yutaka, Daisuke Nakajima, Masatsugu Hamaji, Akihiro Ohsumi, Toyofumi F. Chen-Yoshikawa, Toshihiko Sato, Makoto Sonobe, Akihiko Yoshizawa, Hironori Haga, Hiroshi Date
Lung Cancer.2019; 128: 13. CrossRef
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Obstructive Ileocolitis in Patients With Obstructed Colorectal Cancer – A Matched Case Control Study: Ning-Qi Pang, Tian-Zhi Lim, Yuanpei Zhou, Ker-Kan Tan; Ann Coloproctol. 2018;34(4):175-179. Published online August 31, 2018; DOI: https://doi.org/10.3393/ac.2017.06.14.1

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Abstract PDF

Purpose
Obstructive ileocolitis is an ulcero-inflammatory condition which typically occurs in the ileum or colon proximal to an obstructing colorectal lesion. If left unresolved, it often leads to intestinal perforation. We present a matched case control study of patients with obstructive ileocolitis caused by colorectal cancer to determine if any factors can predict this condition.
Methods
This is a retrospective review of 21 patients with obstructive colorectal cancer and histologically proven obstructive ileocolitis from 2005 to 2015 matched for age and sex with 21 controls with obstructing colorectal cancer without obstructive ileocolitis.
Results
The 21 patients with obstructive ileocolitis had a median age of 71 years (range, 52–86 years). The most common presenting symptom was abdominal pain (n = 16, 76.2%), followed by vomiting/nausea (n = 14, 66.7%) and abdominal distension (n = 12, 57.1%). Interestingly, the radiological feature of pneumatosis intestinalis was noted in only 1 case. No significant differences were observed in baseline comorbidities, clinical presentations, or tumor characteristics between the 2 groups. Patients with obstructive ileocolitis were found to have a significantly higher total leucocyte count (17.1 ± 9.4×109/L vs. 12.0 ± 6.8×109/L, P = 0.016), lower pCO2 (32.3 ± 8.2 mmHg vs. 34.8 ± 4.9 mmHg, P = 0.013), lower HCO3 (18.8 ± 4.5 mmol/L vs. 23.6 ± 2.7 mmol/L, P < 0.001), lower base excess (-6.53 ± 5.32 mmol/L vs. -0.57 ± 2.99 mmol/L, P < 0.001) and higher serum lactate levels (3.14 ± 2.19 mmol/L vs. 1.19 ± 0.91 mmol/L, P = 0.007) compared to controls. No radiological features were predictive of obstructive ileocolitis.
Conclusion
Patients with obstructive ileocolitis tend to present with metabolic acidosis with respiratory compensation, raised lactate, and worse leucocytosis. Radiological features are not useful for predicting this condition.

Citations

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Prognostic Value of Neutrophil-to-Lymphocyte Ratio in Obstructing Colorectal Cancer Treated by Endoscopic Stenting as a Bridge to Surgery
Jiwei Guo, Aik Yong Chok, Hui Jun Lim, Wei Xuan Tay, Weng Kit Lye, Lasitha Bhagya Samarakoon, Emile John Tan, Ronnie Mathew
Annals of Coloproctology.2021; 37(3): 159. CrossRef

Impact of Adjuvant Therapy Type on Survival in Stage II/III Rectal Cancer Without Preoperative Chemoradiation: A Korean Multicenter Retrospective Study: Byung Mo Kang, Jeong-Heum Baek, Sun Jin Park, Seong Kyu Baek, Ki-Jae Park, Hong-Jo Choi, Byung-Noe Bae, Sun Keun Choi, Kap Tae Kim, Jin-Su Kim, Suk-Hwan Lee; Ann Coloproctol. 2018;34(3):144-151. Published online June 30, 2018; DOI: https://doi.org/10.3393/ac.2017.09.26.1

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Abstract PDF

Purpose
This study compared the oncologic impact of postoperative chemotherapy and chemoradiotherapy on patients with rectal cancer without preoperative chemoradiation.
Methods
This retrospective study analyzed 713 patients with a mean follow-up of 58 months who had undergone radical resection for stage II/III rectal cancer without preoperative treatment in nine hospitals from January 2004 to December 2009. The study population was categorized a chemotherapy group (CG, n = 460) and a chemoradiotherapy group (CRG, n = 253). Five-year overall survival (OS) and disease-free survival (DFS) were analyzed, and independent factors predicting survival were identified.
Results
The patients in the CRG were significantly younger (P < 0.001) and had greater incidences of low rectal cancer (P < 0.001) and stage III disease (P < 0.001). Five-year OS (P = 0.024) and DFS (P = 0.012) were significantly higher in the CG for stage II disease; however, they were not significantly different for stage III disease. In the multivariate analysis, independent predictive factors were male sex, low rectal cancer and stage III disease for OS and male sex, abdominoperineal resection, stage III disease and tumor-positive circumferential margin for DFS. However, adjuvant therapy type did not independently affect OS (hazard ratio [HR], 1.243; 95% confidence interval [CI], 0.794–1.945; P = 0.341) and DFS (HR, 1.091; 95% CI, 0.810–1.470; P = 0.566).
Conclusion
Adjuvant therapy type did not affect survival of stage II/III rectal cancer patients without neoadjuvant chemoradiotherapy. These results suggest that adjuvant therapy can be chosen based on the patient’s condition and the policies of the surgeons and hospital facilities.

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Case Report

Colorectal Perforation After Anorectal Manometry for Low Anterior Resection Syndrome: Kyung Ha Lee, Ji Yeon Kim, Young Hoon Sul; Ann Coloproctol. 2017;33(4):146-149. Published online August 31, 2017; DOI: https://doi.org/10.3393/ac.2017.33.4.146

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Abstract PDF

We experienced 3 cases of manometry-induced colon perforation. A 75-year-old man (case 1) underwent anorectal manometry (ARM) 3 years after radiotherapy for prostate cancer and a laparoscopic intersphincteric resection for rectal cancer. A 70-year-old man (case 2) underwent ARM 3 months after conventional neoadjuvant chemoradiotherapy and a laparoscopic low anterior resection for rectal cancer. A 78-year-old man (case 3) underwent ARM 2 months after a laparoscopic intersphincteric resection for rectal cancer. In all cases, a colon perforation with fecal peritonitis occurred. All were treated successfully using prompt and active operations and were discharged without any complications. ARM with a balloon, as a measure of rectal compliance, should be performed 2 months or longer after surgery. If a perforation occurs, prompt and active surgical intervention is necessary due to the high possibility of extensive fecal peritonitis.

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Ssu‐Chi Chen, Kaori Futaba, Wing Wa Leung, Cherry Wong, Tony Mak, Simon Ng, Hans Gregersen
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Bin Zhang, Ke Zhao, Yu‐Juan Zhao, Shu‐Hui Yin, Guang‐Zuan Zhuo, Yong Zhao, Jian‐Hua Ding
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Original Articles

The First Year After Colorectal Surgery in the Elderly: Verena N.N. Kornmann, Jeroen L.A. van Vugt, Anke B. Smits, Bert van Ramshorst, Djamila Boerma; Ann Coloproctol. 2017;33(4):134-138. Published online August 31, 2017; DOI: https://doi.org/10.3393/ac.2017.33.4.134

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Abstract PDF

Purpose

Surgery for colorectal malignancy is increasingly being performed in the elderly. Little is known about the impact of complications on late mortality. This study aimed to analyze whether a complicated postoperative course affects the 1-year survival in elderly patients.

Methods

All consecutive patients older than 75 years of age who underwent colorectal cancer surgery between January 2009 and April 2013 were included in this study. The main outcome was mortality at 1 year after surgery. Logistic regression analyses were performed to determine risk factors for a poor outcome (mortality) after survival of the early postoperative course of surgery at 1-year follow-up. Patients who died within 30 days postoperatively were excluded from analysis.

Results

The early mortality rate was 6.3% (n = 15), and 2 patients died during follow-up as a result of complications after a second surgery. A total of 223 patients survived the perioperative period and were included in this study. Twenty-two patients (9.9%) died during the first year of follow-up. Stage IV disease (P = 0.002), complications of primary surgery (P = 0.016), and comorbidity (P = 0.050) were risk factors for 1-year mortality. Intensive care unit stay, reoperation and readmission were not associated with a worse 1-year outcome.

Conclusion

Elderly patients with stage IV disease at the time of surgery, comorbidity, and postoperative complications are at risk for mortality during the first year after surgery. A patient-tailored approach with special attention to perioperative care should be considered in the elderly.

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M. Fahim, R. A. Visser, L. M. Dijksman, D. H. Biesma, P. G. Noordzij, A. B. Smits
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S.H.J. Ketelaers, M. Fahim, H.J.T. Rutten, A.B. Smits, R.G. Orsini
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Marco Vacante, Erika Cristaldi, Francesco Basile, Antonio Maria Borzì, Antonio Biondi
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Transanal Endoscopic Microsurgery for Patients With Rectal Tumors: A Single Institution's Experience: Audrius Dulskas, Alfredas Kilius, Kestutis Petrulis, Narimantas E. Samalavicius; Ann Coloproctol. 2017;33(1):23-27. Published online February 28, 2017; DOI: https://doi.org/10.3393/ac.2017.33.1.23

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Abstract PDF

Purpose

The purpose of this study was to look at our complication rates and recurrence rates, as well as the need for further radical surgery, in treating patients with benign and early malignant rectal tumors by using transanal endoscopic microsurgery (TEM).

Methods

Our study included 130 patients who had undergone TEM for rectal adenomas and early rectal cancer from December 2009 to December 2015 at the Department of Surgical Oncology, National Cancer Institute, Lithuania. Patients underwent digital and endoscopic evaluation with multiple biopsies. For preoperative staging, pelvic magnetic resonance imaging or endorectal ultrasound was performed. We recorded the demographics, operative details, final pathologies, postoperative lengths of hospital stay, postoperative complications, and recurrences.

Results

The average tumor size was 2.8 ± 1.5 cm (range, 0.5–8.3 cm). 102 benign (78.5%) and 28 malignant tumors (21.5%) were removed. Of the latter, 23 (82.1%) were pT1 cancers and 5 (17.9%) pT2 cancers. Of the 5 patients with pT2 cancer, 2 underwent adjuvant chemoradiotherapy, 1 underwent an abdominoperineal resection, 1 refused further treatment and 1 was lost to follow up. No intraoperative complications occurred. In 7 patients (5.4%), postoperative complications were observed: urinary retention (4 patients, 3.1%), postoperative hemorrhage (2 patients, 1.5%), and wound dehiscence (1 patient, 0.8%). All complications were treated conservatively. The mean postoperative hospital stay was 2.3 days.

Conclusion

TEM in our experience demonstrated low complication and recurrence rates. This technique is recommended for treating patients with a rectal adenoma and early rectal cancer and has good prognosis.

Citations

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