Ampullary tumour.
D018253:Adenoma, Villous / Q000000981:diagnostic imaging* / Q000601:surgery; D014670:Ampulla of Vater; D002760:Cholangiopancreatography, Endoscopic Retrograde; D003138:Common Bile Duct Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged