Giant biliary cystadenoma.

Biliary cystadenoma (BCA) is a rare cystic tumor which originates from intrahepatic or extrahepatic biliary ducts. Intrahepatic BCAs are more common, demonstrate a female predominance, and generally asymptomatic. Radiographic evaluation assists in the preoperative differentiation of these tumors from other cystic liver masses while resection remains the only means for definitive diagnosis. We report a case of massive mucinous intrahepatic BCA initially diagnosed as a nonresectable malignancy presenting in a female patient with progressively increasing abdominal pain and girth. Enucleation of the mass with non-anatomic resection was employed for surgical management of this intrahepatic BCA.