Clip-on-clip closure method for a mucosal defect after colorectal endoscopic submucosal dissection: a prospective feasibility study.

Background: The closure of mucosal defects after colorectal endoscopic submucosal dissection (ESD) remains difficult. Therefore, various methods and devices have been developed to aid in this procedure. However, a standard method for mucosal defect closure after ESD has not been established.