A 64-year-old woman had gastric heterotopic of the duodenal bulb without any specific complaints. The lesion with irregular excrescence was diagnosed by means of target biopsies through endoscopy, and 3 years later, no noteworthy changes were observed in the endoscopic findings of the lesion, and it was also proved by an endoscopic Congo red test that the excrescence had a function of acid output. This is the second report of congenital heterotopic gastric mucosa of the duodenum which was confirmed not only by histological, but also functional examination.
Heterotopic gastric mucosa - Duodenal tumor - Duodenal ulcer
