886 Underwater Endoscopic Mucosal Resection May Only Be Superior to Conventional Endoscopic Mucosal Resection for the Treatment of Colorectal Polyps 4 CM or Larger

INTRODUCTION: Underwater endoscopic mucosal resection (UEMR) is an alternative to conventional submucosal-lift EMR (CEMR) for removal of large non-pedunculated colorectal polyps. Retrospective studies have suggested that UEMR may be more effective at reducing lesion recurrence than CEMR, when performed by experts in this technique. The aim of this study was to compare the generalized safety and effectiveness of UEMR to CEMR for removal of large...