Clinical Features and Outcomes of Endoscopic Resection of Superficial Nonampullary Duodenal Tumors in South Korea: A 15-Year Retrospective Study

ER is effective and safe for SNADETs, achieving high curative resection rates, low recurrence, and acceptable complication risks. Selection of resection method should be individualized, with cold EMR and underwater EMR offering safe and efficient alternatives for the treatment of smaller lesions, while ESD may be reserved for the treatment of larger lesions or complex cases.