Clinical validation of risk scoring systems to predict risk of delayed bleeding after EMR of large colorectal lesions

Background and Aims The Endoscopic Resection Group of the Spanish Society of Endoscopy (GSEED-RE) model and the Australian Colonic Endoscopic Resection (ACER) model were proposed to predict delayed bleeding (DB) after EMR of large superficial colorectal lesions, but neither has been validated. We validated and updated these models. Methods A multicenter cohort study was performed in patients with nonpedunculated lesions ≥20 mm removed by EMR. We...