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Original Article
Anorectal benign disease
Cryotherapy reduces pain post-hemorrhoidectomy (CYPHER): a randomized, controlled, superiority trial of intra-anal ice after surgery for grade III hemorrhoids
Isaac Seow-En, Lionel Raphael Hui Chen, Yun Zhao, Yvonne Ying-Ru Ng, Emile Kwong-Wei Tan
Ann Coloproctol. 2025;41(6):537-544.   Published online December 24, 2025
DOI: https://doi.org/10.3393/ac.2025.00549.0078
  • 2,491 View
  • 83 Download
AbstractAbstract PDFSupplementary Material
Purpose
We aimed to determine whether intra-anal cryotherapy reduces postoperative pain in patients undergoing hemorrhoidectomy.
Methods
This randomized controlled trial was conducted from January 2023 to August 2024. Patients with symptomatic grade III hemorrhoids were randomized 1:1 to receive either 1 minute of intra-anal cryotherapy or standard postoperative care. Because cryotherapy was applied before reversal of general anesthesia, patients were blinded to treatment allocation. The primary outcome was pain at rest on postoperative day (POD) 1. Secondary outcomes included pain after defecation, time to return to work or non-work activities, 30-day complications, and compliance with analgesia. Pain was measured using the visual analog scale.
Results
A total of 50 patients were randomized (25 per group). All 50 were included in the analysis. Baseline clinicodemographic characteristics were comparable between groups. The primary outcome, POD 1 pain at rest, did not demonstrate superiority of cryotherapy compared with standard care (median 3.0 vs. 4.0, P=0.062). However, the POD 1 pain score after defecation was significantly lower with cryotherapy than without (3.0 vs. 4.0, P=0.046). On POD 2, median pain scores at rest and after defecation were both significantly lower in the cryotherapy cohort (at rest: 2.0 vs. 4.0, P=0.043; after defecation: 2.0 vs. 5.0, P=0.001).
Conclusion
Intra-anal cryotherapy significantly reduces pain after defecation in the early postoperative period following surgery for grade III hemorrhoids. Its therapeutic efficacy, ease of application, and safety support consideration for routine use. Trial registration ClinicalTrials.gov identifier: NCT06005727
Reviews
ERAS
Venous thromboembolism among Asian populations with localized colorectal cancer undergoing curative resection: is pharmacological thromboprophylaxis required? A systematic review and meta-analysis
Shih Jia Janice Tan, Emile Kwong-Wei Tan, Yvonne Ying Ru Ng, Rehena Sultana, John Carson Allen, Isaac Seow-En, Ronnie Mathew, Aik Yong Chok
Ann Coloproctol. 2024;40(3):200-209.   Published online May 16, 2024
DOI: https://doi.org/10.3393/ac.2022.01046.0149
  • 5,860 View
  • 202 Download
  • 2 Web of Science
  • 2 Citations
AbstractAbstract PDF
Purpose
We compared the incidence of venous thromboembolism (VTE) among Asian populations with localized colorectal cancer undergoing curative resection with and without the use of pharmacological thromboprophylaxis (PTP).
Methods
A comprehensive literature search was undertaken to identify relevant studies published from January 1, 1980 to February 28, 2022. The inclusion criteria were patients who underwent primary tumor resection for localized nonmetastatic colorectal cancer; an Asian population or studies conducted in an Asian country; randomized controlled trials, case-control studies, or cohort studies; and the incidence of symptomatic VTE, deep vein thrombosis, and/or pulmonary embolism as the primary study outcomes. Data were pooled using a random-effects model. This study was registered in PROSPERO on October 11, 2020 (No. CRD42020206793).
Results
Seven studies (2 randomized controlled trials and 5 observational cohort studies) were included, encompassing 5,302 patients. The overall incidence of VTE was 1.4%. The use of PTP did not significantly reduce overall VTE incidence: 1.1% (95% confidence interval [CI], 0%–3.1%) versus 1.9% (95% CI, 0.3%–4.4%; P = 0.55). Similarly, PTP was not associated with significantly lower rates of symptomatic VTE, proximal deep vein thrombosis, or pulmonary embolism.
Conclusion
The benefit of PTP in reducing VTE incidence among Asian patients undergoing curative resection for localized colorectal cancer has not been clearly established. The decision to administer PTP should be evaluated on a case-bycase basis and with consideration of associated bleeding risks.

Citations

Citations to this article as recorded by  
  • Effectiveness and Safety of Long-Term Venous Thromboembolism Prophylaxis After Colorectal Cancer Surgery: A Retrospective Study
    Ying Zhang, Xiaozhu Zhou, Yi Wu, Shicai Chen, Xiangli Cui, Ying Zhao
    Drugs - Real World Outcomes.2025; 12(3): 479.     CrossRef
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    Frontiers in Cardiovascular Medicine.2025;[Epub]     CrossRef
Laser hemorrhoidoplasty versus conventional hemorrhoidectomy for grade II/III hemorrhoids: a systematic review and meta-analysis
Ian Jun Yan Wee, Chee Hoe Koo, Isaac Seow-En, Yvonne Ying Ru Ng, Wenjie Lin, Emile John Kwong-Wei Tan
Ann Coloproctol. 2023;39(1):3-10.   Published online January 3, 2023
DOI: https://doi.org/10.3393/ac.2022.00598.0085
  • 19,061 View
  • 526 Download
  • 28 Web of Science
  • 36 Citations
AbstractAbstract PDFSupplementary Material
Purpose
This study compared the short- and long-term clinical outcomes of laser hemorrhoidoplasty (LH) vs. conventional hemorrhoidectomy (CH) in patients with grade II/III hemorrhoids.
Methods
PubMed/Medline and the Cochrane Library were searched for randomized and nonrandomized studies comparing LH against CH in grade II/III hemorrhoids. The primary outcomes included postoperative use of analgesia, postoperative morbidity (bleeding, urinary retention, pain, thrombosis), and time of return to work/daily activities.
Results
Nine studies totaling 661 patients (LH, 336 and CH, 325) were included. The LH group had shorter operative time (P<0.001) and less intraoperative blood loss (P<0.001). Postoperative pain was lower in the LH group, with lower postoperative day 1 (mean difference [MD], –2.09; 95% confidence interval [CI], –3.44 to –0.75; P=0.002) and postoperative day 7 (MD, –3.94; 95% CI, –6.36 to –1.52; P=0.001) visual analogue scores and use of analgesia (risk ratio [RR], 0.59; 95% CI, 0.42–0.81; P=0.001). The risk of postoperative bleeding was also lower in the LH group (RR, 0.18; 95% CI, 0.12– 0.28; P<0.001), with a quicker return to work or daily activities (P=0.002). The 12-month risks of bleeding (P>0.999) and prolapse (P=0.240), and the likelihood of complete resolution at 12 months, were similar (P=0.240).
Conclusion
LH offers more favorable short-term clinical outcomes than CH, with reduced morbidity and pain and earlier return to work or daily activities. Medium-term symptom recurrence at 12 months was similar. Our results should be verified in future well-designed trials with larger samples.

Citations

Citations to this article as recorded by  
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