title: Carcinoid tumor of the ampulla of Vater presenting with biliary obstruction: report of four cases.
mesh_terms: D000328:Adult; D000368:Aged; D014670:Ampulla of Vater; D002276:Carcinoid Tumor / Q000150:complications* / Q000175:diagnosis; D002760:Cholangiopancreatography, Endoscopic Retrograde; D002779:Cholestasis / Q000209:etiology*; D003138:Common Bile Duct Neoplasms / Q000150:complications* / Q000175:diagnosis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009456:Neurofibromatosis 1 / Q000150:complications; D012878:Skin Neoplasms / Q000150:complications