CT features of heterotopic pancreas in the stomach and duodenum

Abstract

CT findings of 10 patients with tumor-like heterotopic pancreas in the stomach and duodenum, proven by surgery and pathology between 2007 and 2015, were reviewed retrospectively. The location, size, shape and contrast-enhancement pattern were analyzed. All 10 cases were of single lesion, 7 cases were located in the stomach (3 in gastric antrum, 3 in lesser curvature, 1 in large curvature of gastric body); 3 cases were located in the duodenum (2 in duodenal bulb, 1 in duodenal papilla). The size of lesions was between 6.2 mm×12.3 mm to 24.7 mm×16.2 mm with a mean of 16.8 mm×10.6 mm. Nine lesions were of ovoid or round in shape, 1 was of irregular shape. All cases underwent CT dual phase enhancement scanning. In the venous phase, 9 cases showed bright enhancement, which was composed chiefly of pancreatic acini in pathological examination; 1 cases of cystic shape showed no enhancement, which was composed chiefly of pancreas ducts and large amount of hyperplastic smooth muscle shown on pathology. The contrast-enhancement patterns of 7 cases were similar to those of normal pancreas; those of remaining 2 cases were in disorder. Tumor-like heterotopic pancreas in the stomach and duodenum has certain CT characteristics, which are of diagnostic value. Key words: Stomach; Duodenum; Tomography, spiral computed; Ectopic pancreas