A Case of Cystic Formed Aberrant Pancreas Arising from the Gastric Antrum and Prolapsing into the Duodenum

Abstract

We report a case of aberrant pancreatic prolapse into the duodenum treated with minimally invasive surgery. A 51-year-old man admitted on a diagnosis of an asymptomatic gastric submucosal tumor showed no laboratory data abnormalities. Gastroduodenal endoscopy and fluoroscopy showed a spherical submucosal tumor apparently arising from the antral mucosa and prolapsing into the duodenal bulbus. Histological examination of the tumor showed no specific results. Enhanced computed tomography showed a cystic tumor with peripheral contrast enhancement in the duodenum. Preoperative diagnosis was a gastrointestinal stromal tumor with central degeneration. To prevent intraoperative tumor cells seeding, we conducted a laparoscopeassisted intragastric en-bloc lumpectomy. The tumor was diagnosed histologically as an aberrant pancreas containing nonatypic pancreatic juice. Recovery and discharge were uneventful.