The double pylorus.
D000328:Adult; D000013:Congenital Abnormalities / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D004378:Duodenal Diseases / Q000000981:diagnostic imaging; D005747:Gastric Fistula / Q000000981:diagnostic imaging* / Q000209:etiology; D006801:Humans; D007412:Intestinal Fistula / Q000000981:diagnostic imaging* / Q000209:etiology; D008297:Male; D011708:Pylorus / Q000002:abnormalities* / Q000000981:diagnostic imaging; D011859:Radiography; D013276:Stomach Ulcer / Q000150:complications