Abstract
A-78-year old woman was admitted to our hospital complaining of epigastric pain. Ultrasonographic examination showed a cystic lesion in the left hepatic lobe with thick wall, a septum and a solid node, we therefore suspected this case of cystadenoma or cystadenocarcinoma. The exudate aspirated from the cyst was mucinous and it showed a high level of CA19-9 but the cytological diagnosis was Class II. After percutaneous transhepatic drainage, PTCS was performed. On endoscopic examination, the cyst was found to have smooth lining, and the histopathological findings of biopsy specimens revealed columnar ephithelium and no malignancy. On the basis of these findings, this case was diagnosed as cystadenoma. PTCS was cosidered to be a useful method for the differential diagnosis of cystic lesion in the liver.
