Three cases of primary hepatic lipomatous tumors

We carried out hepatic resections for lipomatous tumors diagnosed by preoperative imaging. Histological examinations after surgery showed a lipoma in case 1, an angiolipoma in case 2, and a hepatocellular caricnoma (HCC) in case 3, respectively. The characteristics of imaging modalities of lipogenic tumors and HCC were examined retrospectively. All cases were demonstrated as hyper echoic tumors on ultrasonogram (US), low density areas on computed tomogram (CT), and hypervascular tumors on angiogram. Although, in HCC (case 3) mosaicy pattern was seen on US, CT, and MRI, and the existence of capsular formation was seen on US, angiogram, and dynamic MRI, the lipogenic tumors did not have these findings on imaging modalities. Consequently these findings seemed to be discrimitive points between HCC and lipogenic tumors.