[Adenoma of the common bile duct simulating a calculus]

We report the case of a 81-year old woman having had a cholecystectomy due to cholelithiasis four years ago. Three years later she suffered from cholangiolithiasis, which was treated by endoscopic revision of the hepatic duct. After another year she had right upper quadrant pain and was admitted to hospital. ERCP revealed an intraluminal filling defect. Suspecting cholangiolithiasis the patient was referred to our hospital for papillotomy and extraction of a "common duct stone". On withdrawal of the basket a tissue mass was removed. The histological examination showed a tubulopapillary adenoma of the common bile duct.