Gel Immersion Endoscopic Mucosal Resection of a Duodenal Adenoma with Gastric Phenotype.

Endoscopic mucosal resection (EMR) is the most common endoscopic intervention for duodenal neoplasms. The literature describes various options, including cold snare polypectomy, underwater EMR (UEMR), and endoscopic submucosal dissection (ESD) [1] [2]. The gel immersion EMR method has been developed in recent years to achieve safe and easy en bloc resection [3] [4]. Here, we report the en bloc resection of an elevated lesion with a prominent depression in the duodenal bulb using the gel immersion EMR technique.