Annals of Coloproctology

Original Article

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; Received May 1, 2024 Accepted June 16, 2024 Published online July 10, 2025; DOI: https://doi.org/10.3393/ac.2024.00276.0039 [Epub ahead of print]

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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.

Review

Inflammatory/benign bowel disease

Clinical outcomes and optimal indications for nonoperative management of acute appendicitis in adult patients: a comprehensive literature review: Hyun Gu Lee, In Ja Park; Ann Coloproctol. 2025;41(2):107-118. Published online April 16, 2025; DOI: https://doi.org/10.3393/ac.2023.00192.0027

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Graphical Abstract Abstract PDF: Appendectomy as the standard treatment for acute appendicitis has been challenged by accumulating evidence supporting nonoperative management with antibiotics as a potential primary treatment. This review aimed to summarize the clinical outcomes and the optimal indications for nonoperative management of acute appendicitis in adults. Current evidence suggests that uncomplicated and complicated appendicitis have different pathophysiologies and should be treated differently. Nonoperative management for uncomplicated appendicitis was not inferior to appendectomy in terms of complications and length of stay, with less than a 30% failure rate at 1 year. The risk of perforation and postoperative complications did not increase even if nonoperative management failed. Complicated appendicitis with localized abscess or phlegmon could also be treated conservatively, with a success rate of more than 80%. An interval appendectomy following successful nonoperative management is recommended only for patients over the age of 40 years to exclude appendiceal malignancy. The presence of appendicoliths increased the risk of treatment failure and complications; thus, it may be an indication for appendectomy. Nonoperative management is a safe and feasible option for both uncomplicated and complicated appendicitis. Patients should be informed that nonoperative management may be a safe alternative to surgery, with the possibility of treatment failure.

Original Articles

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.

Translational/basic research

Preclinical testing of a new radiofrequency ablation device in a porcine perianal fistula model: Sunseok Yoon, Jung-Woo Choi, Yongtaik Son, Hyun Soon Lee, Kwang Dae Hong; Ann Coloproctol. 2025;41(1):84-92. Published online February 26, 2025; DOI: https://doi.org/10.3393/ac.2024.00626.0089

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Abstract PDF: Purpose
Anorectal fistulas present a treatment challenge, with conventional surgical methods potentially resulting in complications such as fecal incontinence. To improve patient outcomes, more effective and minimally invasive therapies are critically needed. In this study, an optimal porcine model for the creation of anorectal fistulas was developed and used to evaluate the efficacy of radiofrequency ablation (RFA) therapy.
Methods
Two distinct but related experiments were conducted. In the first experiment, a reliable and standardized porcine anorectal fistula model was developed. In the second, the healing process was assessed, and outcomes were compared between the RFA-treated group and the control group using the established porcine model.
Results
The results indicated that a 3.5-cm fistula tract length and a 14-day evaluation period following seton removal are optimal for the porcine anorectal fistula model. In the second experiment, the RFA group tended to exhibit better outcomes regarding fistula closure, although the differences were not statistically significant. Histopathologically, no significant difference in inflammation grade was observed between groups; however, scar tissue was more predominant in the RFA group.
Conclusion
The findings suggest that RFA therapy may offer potential benefits in the treatment of anorectal fistulas, as demonstrated using a porcine model. To validate these results and explore the mechanisms of action underlying RFA therapy for anorectal fistulas, further research involving larger sample sizes and a more robust study design is required.

Review

Colorectal cancer

Beyond survival: a comprehensive review of quality of life in rectal cancer patients: Won Beom Jung; Ann Coloproctol. 2024;40(6):527-537. Published online December 20, 2024; DOI: https://doi.org/10.3393/ac.2024.00745.0106

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Abstract PDF

Rectal cancer is one of the most common carcinomas and a leading cause of cancer-related mortality. Although significant advancements have been made in the treatment of rectal cancer, the deterioration of quality of life (QoL) remains a challenging issue. Various tools have been developed to assess QoL, including the Functional Assessment of Cancer Therapy-Colorectal (FACT-C) scale, the QLQ-C30 and QLQ-CR29 by the European Organization for Research and Treatment of Cancer (EORTC), and the 36-Item Short Form Health Survey (SF-36). Factors such as the lower location of the tumor, radiation therapy, chemoradiotherapy, and chemotherapy are associated with a decline in QoL. Furthermore, anastomotic leakage following rectal cancer resection is an important risk factor affecting QoL. With the development of novel treatment approaches, including neoadjuvant therapies such as chemoradiotherapy and total neoadjuvant therapy, the rate of clinical complete remission has increased, leading to the emergence of organ-preserving strategies. Both local excision and the “watch-and-wait” approach following neoadjuvant therapy improved functional outcomes and QoL. Efforts to improve QoL after rectal cancer surgery are ongoing in surgical techniques for rectal cancer. Since QoL is determined by a complex interplay of factors, including the patient's physical condition, surgical techniques, and psychological and social elements, a comprehensive approach is necessary to understand and enhance it. This review aims to describe the methods for measuring QoL in rectal cancer patients after surgery, the key risk factors involved, and various strategies and efforts to improve QoL outcomes.

Citations

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Meeting report on the 8th Asian Science Editors’ Conference and Workshop 2024
Eun Jung Park
Science Editing.2025; 12(1): 66. CrossRef
Editorial: Organ preservation for rectal cancer patients
Ionut Negoi, John R. T. Monson, Leonardo Bustamante-Lopez, Zoe Garoufalia, Vito D'Andrea, Sameh Hany Emile
Frontiers in Surgery.2025;[Epub] CrossRef

Original Articles

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

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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

Review

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

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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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From the Editor: Uniting expertise, a new era of global collaboration in coloproctology
In Ja Park
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Original Articles

Colorectal cancer

Oncologic outcomes and associated factors of colon cancer patients aged 70 years and older: Byeo Lee Lim, In Ja Park, Jun-Soo Ro, Young Il Kim, Seok-Byung Lim, Chang Sik Yu; Ann Coloproctol. 2025;41(3):198-206. Published online August 5, 2024; DOI: https://doi.org/10.3393/ac.2023.00367.0052

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Abstract PDF Supplementary Material

Purpose
The aim of this study was to examine the prognosis and associated risk factors, including adjuvant chemotherapy (CTx), in elderly patients with colon cancer.
Methods
This retrospective study included patients who underwent radical resection for colon cancer between January 2010 and December 2014 at Asan Medical Center. The effects of stage, risk factors, and chemotherapy on overall survival (OS) and recurrence-free survival (RFS) were compared in patients aged ≥70 and <70 years.
Results
Of 3,313 patients, 933 (28.1%) was aged ≥70 years. Of the 1,921 patients indicated for adjuvant CTx, 1,294 of 1,395 patients (92.8%) aged <70 years and 369 of 526 patients (70.2%) aged ≥70 years received adjuvant CTx. Old age (≥70 years) was independently associated with RFS in overall cohort. Among patients aged ≥70 years indicated for adjuvant CTx, the 5-year OS (81.6% vs. 50.4%, P<0.001) and RFS (82.9% vs. 67.4%, P=0.025) rates were significantly higher in those who did than did not receive adjuvant CTx. Additionally, adjuvant CTx was confirmed as independent risk factor of both OS and RFS in patients aged ≥70 years indicated for adjuvant CTx.
Conclusion
Old age was associated with poor RFS and adjuvant CTx had benefits in OS as well as RFS in elderly patients eligible for adjuvant CTx.

Citations

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Immunological changes and recovery-related factors in older patients with colon cancer: A pilot trial
Byeo Lee Lim, Young Il Kim, Jong Lyul Lee, Chan Wook Kim, Yong Sik Yoon, Yousun Ko, Kyung Won Kim, In Ja Park
Journal of Geriatric Oncology.2025; 16(3): 102200. CrossRef
Stage II-III colorectal cancer in geriatric patients: Clinicopathological features and chemotherapy utilization
Yakup Duzkopru, Özlem Doğan
Turkish Journal of Clinics and Laboratory.2025; 16(1): 118. 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
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

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.

Guideline

Colorectal cancer

Colon cancer: the 2023 Korean clinical practice guidelines for diagnosis and treatment: Hyo Seon Ryu, Hyun Jung Kim, Woong Bae Ji, Byung Chang Kim, Ji Hun Kim, Sung Kyung Moon, Sung Il Kang, Han Deok Kwak, Eun Sun Kim, Chang Hyun Kim, Tae Hyung Kim, Gyoung Tae Noh, Byung-Soo Park, Hyeung-Min Park, Jeong Mo Bae, Jung Hoon Bae, Ni Eun Seo, Chang Hoon Song, Mi Sun Ahn, Jae Seon Eo, Young Chul Yoon, Joon-Kee Yoon, Kyung Ha Lee, Kyung Hee Lee, Kil-Yong Lee, Myung Su Lee, Sung Hak Lee, Jong Min Lee, Ji Eun Lee, Han Hee Lee, Myong Hoon Ihn, Je-Ho Jang, Sun Kyung Jeon, Kum Ju Chae, Jin-Ho Choi, Dae Hee Pyo, Gi Won Ha, Kyung Su Han, Young Ki Hong, Chang Won Hong, Jung-Myun Kwak, Korean Colon Cancer Multidisciplinary Committee; Ann Coloproctol. 2024;40(2):89-113. Published online April 30, 2024; DOI: https://doi.org/10.3393/ac.2024.00059.0008

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Abstract PDF Supplementary Material

Colorectal cancer is the third most common cancer in Korea and the third leading cause of death from cancer. Treatment outcomes for colon cancer are steadily improving due to national health screening programs with advances in diagnostic methods, surgical techniques, and therapeutic agents.. The Korea Colon Cancer Multidisciplinary (KCCM) Committee intends to provide professionals who treat colon cancer with the most up-to-date, evidence-based practice guidelines to improve outcomes and help them make decisions that reflect their patients’ values and preferences. These guidelines have been established by consensus reached by the KCCM Guideline Committee based on a systematic literature review and evidence synthesis and by considering the national health insurance system in real clinical practice settings. Each recommendation is presented with a recommendation strength and level of evidence based on the consensus of the committee.

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Optimal extent of lymph node dissection in clinical early-stage right colon cancer: a retrospective analysis
Hyeung-min Park, Jaram Lee, Soo Young Lee, Suk Hee Heo, Yong Yeon Jeong, Hyeong Rok Kim, Chang Hyun Kim
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Rıdvan Yavuz, Orhan Aras, Hüseyin Çiyiltepe, Onur İlkay Dinçer, Ahmet Şükrü Alparslan, Tebessüm Çakır
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Original Articles

Colorectal cancer

Comparing the efficacy of combined versus single immune cell adaptive therapy targeting colorectal cancer: Denis Nchang Che, NaHye Lee, Hyo-Jung Lee, Yea-Won Kim, Solongo Battulga, Ha Na Lee, Won-Kook Ham, Hyunah Lee, Mi Young Lee, Dawoon Kim, Haengji Kang, Subin Yun, Jinju Park, Daeyoun David Won, Jong Kyun Lee; Ann Coloproctol. 2024;40(2):121-135. Published online April 22, 2024; DOI: https://doi.org/10.3393/ac.2023.00402.0057

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Abstract PDF Supplementary Material: Purpose
Colorectal cancer (CRC) is the most frequent cancer with limited therapeutic achievements. Recently, adoptive cellular immunotherapy has been developed as an antitumor therapy. However, its efficacy has not been tested in CRC. This study investigated the ability of an immune cell cocktail of dendritic cells (DCs), T cells, and natural killer (NK) cells to overcome immunological hurdles and improve the therapeutic efficacy of cell therapy for CRC.
Methods
CRC lysate-pulsed monocyte-derived DCs (Mo-DCs), CRC antigen-specifically expanded T cells (CTL), and in vitro-expanded NK cells were cultured from patient peripheral blood mononuclear cells (PBMC). The ability of the combined immune cells to kill autologous tumor cells was investigated by co-culturing the combined immune cells with patient-derived tumor cells.
Results
The Mo-DCs produced expressed T cell co-stimulating molecules like CD80, CD86, human leukocyte antigen (HLA)-DR and HLA-ABC, at high levels and were capable of activating naive T cells. The expanded T cells were predominantly CD8 T cells with high levels of CD8 effector memory cells and low levels of regulatory T cells. The NK cells expressed high levels of activating receptors and were capable of killing other cancer cell lines (K562 and HT29). The immune cell cocktail demonstrated a higher ability to kill autologous tumor cells than single types. An in vivo preclinical study confirmed the safety of the combined immune cell adaptive therapy showing no therapy-related death or general toxicity symptoms.
Conclusion
The results suggested that combined immune cell adaptive therapy could overcome the limited efficacy of cell immunotherapy.

Colorectal cancer

Long-term bowel functional outcomes following anal sphincter-preserving surgery for upper and middle rectal cancer: a single-center longitudinal study: Ahmad Sakr, Seung Yoon Yang, Min Soo Cho, Hyuk Hur, Byung Soh Min, Kang Young Lee, Nam Kyu Kim; Ann Coloproctol. 2024;40(1):27-35. Published online February 28, 2024; DOI: https://doi.org/10.3393/ac.2022.01067.0152

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Abstract PDF

Purpose
Despite advances in neoadjuvant chemoradiotherapy and anal sphincter-preserving surgery for rectal cancer, bowel dysfunction is still unavoidable and negatively affects patients’ quality of life. In this longitudinal study, we aimed to investigate the changes in bowel function with follow-up time and the effect of neoadjuvant chemoradiotherapy on bowel function following low anterior resection for rectal cancer.
Methods
In this study, 171 patients with upper or middle rectal cancer who underwent low anterior resection between 2012 and 2018 were included. Bowel function was assessed longitudinally with Memorial Sloan Kettering Cancer Center Bowel Function Instrument and Wexner scores every 6 months after restoration of bowel continuity. Patients with at least 2 follow-up visits were included.
Results
Overall, 100 patients received neoadjuvant chemoradiotherapy. Urgency, soilage, and fecal incontinence were noted within 24 months in the patients treated with neoadjuvant chemoradiotherapy. After 2 years of follow-up, significant bowel dysfunction and fecal incontinence were observed in the neoadjuvant chemoradiotherapy group. Low tumor level and neoadjuvant chemoradiotherapy were associated with delayed bowel dysfunction.
Conclusion
Neoadjuvant chemoradiotherapy in combination with low tumor level was significantly associated with delayed bowel dysfunction even after 2 years of follow-up. Therefore, careful selection and discussion with patients are paramount.

Citations

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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
Beyond survival: a comprehensive review of quality of life in rectal cancer patients
Won Beom Jung
Annals of Coloproctology.2024; 40(6): 527. CrossRef

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.

Citations

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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
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

Review

Colorectal cancer

Total neoadjuvant therapy for rectal cancer: evidence and challenge: Suk-Hwan Lee; Ann Coloproctol. 2023;39(4):301-306. Published online August 29, 2023; DOI: https://doi.org/10.3393/ac.2023.00269.0038

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189 Download
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Abstract PDF

Recent advances in the management of rectal cancer have dramatically changed the clinical practice of colorectal surgeons because the main focus of rectal cancer treatment has changed from sphincter-saving to an organ-preserving strategies. Modifying the delivery of systemic chemotherapy to improve patients’ survival is another progress in colorectal cancer management, known as total neoadjuvant therapy (TNT). TNT is a new strategy used by colorectal surgeons to improve the quality of life and survival of patients after treatment. TNT poses limitations or obstacles, such as overtreatment issues in patients with stage I rectal cancer. However, considering the quality-of-life issues in patients with low-lying rectal cancer necessitating a permanent colostomy, the indication for TNT will be expanded. This review summarizes the recently conducted clinical trials and foresees future perspectives on TNT.

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Boyu Kang, Yihuan Qiao, Jun Zhu, Jipeng Li
Frontiers in Oncology.2025;[Epub] CrossRef
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Kristina Šemanjski, Karla Lužaić, Jure Brkić
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Youn Young Park, Nam Kyu Kim
Annals of Gastroenterological Surgery.2024; 8(5): 761. CrossRef
A nomogram for predicting the overall survival in rectal cancer patients after total neoadjuvant therapy
Z. Liu, M. He, X. Wang
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Andrea Norte, Carmen Martínez, Ana Pasalodos, Ivette Tort, Anna Sánchez, Pilar Hernández, Jesús Bollo, Eduard Maria Targarona
Cirugía Española (English Edition).2024; 102(11): 590. CrossRef
Impact of the laparoscopic approach, early closure and preoperative stimulation on outcomes of ileostomy closure after rectal resection
Andrea Norte, Carmen Martínez, Ana Pasalodos, Ivette Tort, Anna Sánchez, Pilar Hernández, Jesús Bollo, Eduard Maria Targarona
Cirugía Española.2024; 102(11): 590. 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
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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
Annals of Surgical Treatment and Research.2023; 105(6): 341. CrossRef

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