Clinical Outcomes of Partial Injection Underwater Endoscopic Mucosal Resection for Superficial Non-ampullary Duodenal Epithelial Tumors (With Video)

Objectives

Although endoscopic resection is widely performed for superficial non-ampullary duodenal epithelial tumors (SNADETs), conventional endoscopic mucosal resection (CEMR) may be associated with suboptimal complete resection rates. Partial injection underwater EMR (PI-UEMR) has been proposed to improve the visualization of distal lesion margins and facilitate en bloc resection. We aimed to evaluate the outcomes of PI-UEMR for SNADETs, using CEMR as a historical institutional comparator.