The authors present 21 cases of aberrant pancreas with gastric and duodenal location (heterotopias under the shape of inclusions, nodules or true adenomas) included besides the rare cases of adenoma developed from Brunner and Lieberkühn glands in the "choristomas" category. Asymptomatic or with clinical phenomena and complications "borrowed" from the associated peptic ulcers (15 cases) the diagnosis of pancreatic heterotopias is usually an interoperatory or even histopathological surprise, the X-ray examination with the classical image "in cocard" and the endoscopy being rarely evocative. The surgical treatment is generally conservative and is dominated by the presence or lack of the concomitant peptic ulcer.