Hepatobiliary cystadenoma mimicking liver hydatid cyst.

Hepatobiliary cystadenoma is a rare tumor which is difficult to diagnose before surgery and pathologic examination. Herein we present the case of a 32-year-old woman from an endemic area for hydatid cysts who presented with the impression of hydatid cyst of the liver, which was completely resected. Histopathologic examination revealed a mucinous hepatic cystadenoma with ovarian-like stroma. She had an uneventful postoperative course and now, after one year, she is doing well.