Abstract
Pancreas with heterotopic gastric mucosa is a rare congenital malformation and hardly be detected.In the embryonic stages, primitive gut, including foregut, midgut and hindgut, originated in the gastrula endoderm. Stomach and pancreas were stemed from the ending of foregut. When abnormal differentiation occurred, pancreatic tissue was usually ectopic to the stomach, but heterotopic gastric mucosa of the pancreas was rare. This malformation was usually confirmed by post-operative pathology. We report a case of congenital malformation of heterotopic gastric mucosa of pancreas detected by EUS and contrast enhanced EUS. The manifestations in EUS are different from the pancreatic cyst lesion.