Heterotopic pancreas in the body of the stomach

Abstract

A 45-year old man was admitted with a history of epigastric pain for 3 months. Physical examination, routine blood tests and abdominal ultrasound were unremarkable. Oesophagogastroduodenoscopy (OGD) showed a sessile mass with normal overlying mucosa arising from the upper part of the body on the anterior wall of the stomach close to the lesser curvature (Figure 1). Multiple biopsies were taken and the histology showed normal gastric mucosa. Contrast enhanced CT scan of the abdomen showed a submucosal mass arising from the body of the stomach suggestive of a gastro-intestinal stromal tumour (GIST). There was no evidence of infiltration across the stomach wall or regional lymphadenopathy. Endoscopic ultrasound (EUS) showed a predominantly hyperechoic submucosal lesion (Figure 2). The patient underwent open surgery and the lesion was completely excised. Histology showed heterotopic pancreatic tissue in the submucosa of the stomach.