A case of multiple hepatic cysts that presented a cystadenocarcinoma-like hemorrhagic lesion during follow-up

Abstract

A 49-year-old woman, complaining back pain on the right side, showed multiple hepatic cysts on ultrasonography (US) and computed tomography (CT); one of the cysts in segment 8 of the liver contained a solid mass. Four months after the first examination, US showed no change. Ten months after the first examination, however, an increase in the size of the concerned cyst was revealed by US, together with an echogenic mass therein. Based on these findings, a cystadenocarcinoma was suspected, and anterior segmentectomy of the liver was done. Eventually, however, it was revealed histologically that the cyst wall was consisted of fibrous tissue, and the echogenic mass in the cystic lesion corresponded to a blood clot with proliferation of capillaries; not a picture of the cystadenocarcinoma at all.