Efficacy of under-gel endoscopic mucosal resection method for colonic lesion extending into the diverticulum

Underwater endoscopic mucosal resection (EMR) is currently performed in various situations [1] [2] [3] [4]. One advantage to using water is the buoyancy effect on the mucosa, which raises it from the deeper muscularis propria without submucosal injection [1]. However, it takes time to fill the intestinal tract with water, leading to an increased risk of peristalsis and abdominal distension. In addition, underwater EMR on lesions extending into...