Surgical treatment of biliary cystadenomas.

Biliary cystadenomas are rare cystic tumors. They are typically multilocular lesions containing mucinous fluid. Most reported cases are intrahepatic lesions. Biliary cystadenomas are thought to be premalignant tumors. It is also difficult to differentiate biliary cystadenoma from biliary cystadenocarcinoma preoperatively by imaging studies or tumor markers. Complete resection is the treatment of choice for biliary cystadenoma. We reported our institutional experience in treating 7 cases with intrahepatic biliary cystadenoma by complete resection. There is no recurrence during the period of follow-up.