A case report on a muco-submucosal elongated polyp of the duodenum treated with endoscopic resection

Abstract

Colonic muco-submucosal elongated polyps (MSEPs) are a new clinical entity first reported in 1994. The existence of long and slender polypoid lesion like an MSEP in the duodenum is rare. A 76-year-old man who complained of epigastralgia was diagnosed via endoscopy as having an elongated polyp in the duodenum with a head part resembling a half-sized sumo referee’s fan.. Endoscopic polypectomy with the snaring technique was performed after the injection of epinephrine-saline into the neck of the polyp. Bleeding from exposed blood vessels was controlled with clips. Histological findings of resected specimen were compatible for the features of MSEP, and the polyp was covered with edematous mucosa and submucosa with dilated blood vessels and lymphangiectasia. Although the mechanism of the development of such polyps remains unknown in general, elongation in this case may have been caused by the polyp form and gastroduodenal motion.