Underwater endoscopic mucosal resection for non-pedunculated colorectal lesions. A prospective single-arm study

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Abstract

Background – Underwater endoscopic mucosal resection (UEMR) has emerged as a revolutionary method allowing resection of colorectal lesions without submucosal injection. Brazilian literature about this technique is sparse. Objective – The aim of this study was evaluate the efficacy and safety of UEMR technique for removing non-pedunculated colorectal lesions in two Brazilian tertiary centers. Methods – This prospective study was conducted between June 2016 and May 2017. Naïve and non-pedunculated lesions without signs of submucosal invasion were resected using UEMR technique. Results – A total of 55 patients with 65 lesions were included. All lesions, except one, were successfully and completely removed by UEMR (success rate 98.5%). During UEMR, two cases of bleeding were observed (3.0%). One patient had abdominal pain on the day after resection without pneumoperitoneum. There was no perforation or delayed bleeding. Conclusion – This study supports the existing data indicating acceptable rates of technical success, and low incidence of adverse events with UEMR. The results of this Brazilian study were consistent with previous abroad studies.

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Lenz, L., Martins, B., Kawaguti, F. S., Tellian, A., Pennachi, C. M. P. S., Sorbello, M., … Ribeiro, U. (2020). Underwater endoscopic mucosal resection for non-pedunculated colorectal lesions. A prospective single-arm study. Arquivos de Gastroenterologia, 57(2), 193–197. https://doi.org/10.1590/s0004-2803.202000000-37

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