악성 종양을 동반한 담관낭종

A case of carcinoma associated with choledochal cyst in a 25 year-old male is presented. The choledochal cyst is relatively rare lesion in the biliary system, moreover the carcinoma developed in the choledochal cyst has been reported rarely. The patient has complained of epigastric pain, fever and chill. Abdominal CT scan and ultrasonography showed markedly dilated left intrahepatic duct and common bile duct. At operation, grossly there was a true cystic dilatation from left intrahepatic duct to common bile duct and a hard nodular mass at the posterior wall of the dilated common bile duct. Microscopically this was moderately well differentiated adenocarcinorna surrounded by desmoplastic reaction at the infiltrated wall of the extrahepatic duct.