A Case of Submucosal Tumor of the Stomach, Composed of Heterotopic Gastric Mucosa

Abstract

A 53-year-old woman was admitted for further examinations for gastric polypoid lesion which looked like submucosal tumor by X-ray examination. X-ray films revealed elevated lesion of 2cm in diameter with bridging folds located on the anterior wall of the middle gastric body close to the lesser curvature. Endoscopically, elevation had bridging folds, covered with normal gastric mucosa and a red small depression was observed on the top. The laparoscopy assisted partial resection of the stomach was performed. Laparoscopically, a white, elastic hard nodule was observed on the serosal surface. The excised specimen revealed a submucosal tumor, 23x20x12mm in size. The heterotopic gastric mucosa with cystic changes was microscopically observed in the submucosal layer extending to submucosal layer. No malignancy was detected. No acinar nor duct structures ware seen, which is pathognomonic for ectopic pancreas. No recurrence was seen 1 year after resection.