Endoscopic Submucosal Dissection Using a Safe Knife V for a Large Flat Lesion in the Ascending Colon

Recently, colorectal endoscopic submucosal dissection (ESD) obtained official approval as a standard treatment procedure in Japan. Colorectal ESD is technically more difficult and risky than gastric ESD. However, by understanding the anatomical obstacles in colorectal ESD and using proper methods and tips to overcome the difficulties, ESD is a feasible and useful treatment method for early colorectal neoplastic lesions as well. In this video, technical details of colorectal ESD using a Safe Knife are presented. This article is part of an expert video encyclopedia.