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Effectiveness and safety of cold snare polypectomy and cold endoscopic mucosal resection for nonpedunculated colorectal polyps of 10-19 mm: a multicenter observational cohort study

医学 息肉切除术 结肠镜检查 粘膜切除术 多中心研究 观察研究 队列研究 内科学 普通外科 队列 外科 内窥镜检查 结直肠癌 切除术 随机对照试验 癌症
作者
Dileep Mangira,Spiro Raftopoulos,Sara Vogrin,Imogen Hartley,Alexandra Mack,Kathryn Gazelakis,Kumanan Nalankilli,Andrew Trinh,Andrew J. Metz,Mark Appleyard,Florian Grimpen,Timothy R. Elliott,Gregor J. Brown,Alan Moss
出处
期刊:Endoscopy [Thieme Medical Publishers (Germany)]
卷期号:55 (07): 627-635 被引量:18
标识
DOI:10.1055/a-2029-9539
摘要

Background Cold snare polypectomy (CSP) is the standard of care for the resection of small (< 10 mm) colonic polyps. Limited data exist for its efficacy for medium-sized (10–19 mm) nonpedunculated polyps, especially conventional adenomas. This study evaluated the effectiveness and safety of CSP/cold endoscopic mucosal resection (C-EMR) for medium-sized nonpedunculated colonic polyps. Methods A prospective multicenter observational study was conducted of all morphologically suitable nonpedunculated colonic polyps of 10–19 mm removed by CSP/C-EMR between May 2018 and June 2021. Once resection was complete, multiple biopsies were taken of the margins circumferentially and centrally. The primary outcome was the incomplete resection rate (IRR), based on residual polyp in these biopsy specimens. Secondary outcomes were recurrence rate at first surveillance colonoscopy and rates of adverse events (AEs). Results CSP/C-EMR was performed for 350 polyps (median size 15 mm; 266 [76.0 %] Paris 0-IIa classification) in 295 patients. Submucosal injection was used for 87.1 % (n = 305) of polyps. Histology showed 68.6 % adenomas, 26.0 % sessile serrated lesions (SSLs) without dysplasia, 4.0 % SSL with dysplasia, and 1.4 % hyperplastic polyps. The IRRs based on margin or central biopsies being positive were 1.7 % (n = 6) and 0.3 % (n = 1), respectively. The polyp recurrence rate was 1.7 % (n = 4) at first surveillance colonoscopy – completed for 65.4 % (n = 229) of polyps at a median interval of 9.7 months. AEs occurred in 3.4 % (n = 10) of patients: four with post-polypectomy pain; three self-limiting post-polypectomy bleeds; two post-polypectomy-syndrome-like presentations; and one intraprocedural bleed treated with clips. There were no perforations. Conclusion CSP/C-EMR for morphologically suitable nonpedunculated colonic polyps of 10–19 mm is effective and safe, including for conventional adenomas. Rates of incomplete resection and recurrence were low, with few AEs. Studies directly comparing this method with hot snare resection are required.
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