title: Biliary obstruction by heterotopic gastric mucosa at the ampulla of Vater.
mesh_terms: D000368:Aged; D014670:Ampulla of Vater; D001651:Cholestasis, Extrahepatic / Q000209:etiology* / Q000473:pathology; D002828:Choristoma / Q000150:complications*; D003138:Common Bile Duct Neoplasms / Q000150:complications*; D005753:Gastric Mucosa; D006801:Humans; D008297:Male