Abstract
We report a rare case of solitary hepatic epithelioid hemangioendothelioma (HEH). A 72-year-old man, who had undergone radiation and hormone therapy for prostatic carcinoma, had a thoracic CT scan due to the presence of common cold like symptoms. No abnormal findings were detected in the respiratory system. However, a liver tumor was incidentally found in the right lobe. The tumor showed ring enhancement on dynamic CT scans ; around the tumor the dilatation of intrahepatic bile ducts was detected. Given EOB-MRI and DSA findings, this case was clinically diagnosed as intrahepatic cholangiocarcinoma (ICC). The patient's prognosis was thought to be related not to his prostatic carcinoma status, but to the ICC. Thus, the patient consented to ICC surgery. Thus, a radical right posterior segmentectomy was performed. Histopathological and immunohistochemical examinations of the specimen revealed that small spindle tumor cells were in a matrix, which consisted of a large amount of collagen fibers in the peripheral region of the tumor, and this tumor was immunohistochemically CK-negative, CD34-positive, S100p-negative, and HMB45-negative. Based on these findings, this case was finally diagnosed as HEH. Solitary HEH is rarely reported.
