Inferior vena cava obstruction and collateral circulation as unusual manifestations of hepatobiliary cystadenocarcinoma.

Background: Hepatobiliary cystadenocarcinoma represents a rare epithelial malignant tumor derived from the intrahepatic bile duct.

Methods: A 71-year-old woman, who had undergone laparoscopic drainage of a cystic lesion of the right hepatic lobe, was misdiagnosed as having hepatic echinococcal disease, and received intracystic infusion of 95% ethanol four years ago. She was admitted to our hospital for further treatment.