Hepatocellular carcinoma with pyrexia: report of a case.

Reported here is a case of an unusual type of hepatocellular carcinoma (HCC). Since this patient with liver mass exhibited continuous pyrexia, an inflammatory pseudotumor or abscess was strongly suspected. Two-phased incremental CT, MR with and without Gd-DTPA administration, and angiography demonstrated peripheral enhancement of the hepatic mass. Histologically, the tumor proved to be HCC with sarcomatoid degeneration. When one encounters a patient with a mass clinically and radiologically mimicking an inflammatory pseudotumor or an abscess, poorly differentiated HCC with sarcomatoid degeneration should be suspected.