Endoscopic Submucosal Dissection for Tumors Involving the Ileocecal Valve with Extension into the Terminal Ileum: a Multicenter Study from the Hiroshima GI Endoscopy Research Group.

The efficacy and safety of endoscopic submucosal dissection (ESD) for tumors extending into the terminal ileum remain obscure. We aimed to evaluate the outcomes of ESD for tumors involving the ileocecal valve (ICV) with extension into the terminal ileum. Sixty-eight patients (40 men; mean age, 67 years) with 68 tumors involving the ICV that were resected by ESD between December 2013 and December 2018 were included and classified into Group A (21 tumors with extension into the terminal ileum) and Group B (47 tumors without extension). ESD outcomes were compared between groups. The clinical features of the patients and tumors were not significantly different between the groups. There were no significant differences in en bloc resection rate (95