Endoscopic submucosal dissection for large colorectal epithelial neoplasms: A single center experience in north China

Colorectal endoscopic submucosal dissection (ESD) is a technically difficult procedure with a higher risk of complications, especially for large colorectal epithelial neoplasms. This study aimed to report our experience and clinical outcomes, and to estimate the factors associated with incomplete resection and complications.One hundred forty one colorectal epithelial neoplasms in 130 consecutive patients treated by ESD at the endoscopy center of Tianjin Medical University General Hospital from January 2013 to January 2016 were included. Factors associated with the incomplete resection and perforation were evaluated.The mean colorectal epithelial neoplasm size was 26.5 ± 9.5 (15.0-60.0) mm, the mean procedure time of colorectal ESD was 76.1 ± 48.7 (36.5-195.0) minutes. The en bloc resection rate, the en bloc R0 resection rate, and the curative resection rate, were 93.6% (132/141), 91.5% (129/141), and 88.7% (125/141), respectively. Perforation during colorectal ESD occurred in 7 patients (4.9%), postoperative bleeding occurred in 4 patients (2.8%). There was no recurrence occurred in all patients during follow periods of 13.2 ± 8.6 (6.0-36.0) month. Submucosal fibrosis was the only independent factor related to both incomplete resection (odds ratio [OR] 12.425; 95% confidence interval [CI] 2.501-61.734; P = .002) and perforation (OR 10.646; 95%CI 1.188-95.421; P = .035) of colorectal ESD.Colorectal ESD is a safe and effective technique for en bloc resection of large colorectal epithelial neoplasms. Submucosal fibrosis was independently related to incomplete resection and perforation.