title: Atypical papillary hyperplasia of the pancreatic duct mimicking obstructing pancreatic carcinoma.
mesh_terms: D014670:Ampulla of Vater / Q000473:pathology*; D001660:Biliary Tract Diseases / Q000000981:diagnostic imaging / Q000473:pathology; D002758:Cholangiography; D003251:Constriction, Pathologic; D003937:Diagnosis, Differential; D006801:Humans; D006965:Hyperplasia; D008297:Male; D008875:Middle Aged; D010179:Pancreas / Q000000981:diagnostic imaging; D010190:Pancreatic Neoplasms / Q000000981:diagnostic imaging*; D011230:Precancerous Conditions / Q000473:pathology