title: Granular cell schwannoma of the extrahepatic biliary system.
abstract: We report the case of a woman who presented with a typical picture of cholelithiasis and choledocholithiasis. A percutaneous transhepatic cholangiogram revealed instead a concentric narrowing of the common bile duct and at operation she was found to have a rare, benign tumor of the extrahepatic biliary tree, a granular cell schwannoma.
mesh_terms: D001650:Bile Duct Neoplasms / Q000175:diagnosis* / Q000473:pathology; D005260:Female; D006801:Humans; D008875:Middle Aged; D009442:Neurilemmoma / Q000175:diagnosis* / Q000473:pathology