A Case of Hepatic Angiomyolipoma

Yuichi Machiki, Yuji Nimura, Naokazu Hayakawa, Junnichi Kamiya, Satoshi Kondo, Masato Nagino, Masahiko Miyaji, Tetsuro Nagasaka*

First Department of Surgery, Department of Clinical Laboratory*, Nagoya University School of Medicine

We report a 45-year-old asymptomatic female patient in whom abdominal CT revealed a hepatic tumor. Plain CT scan showed a low absorptive lesion in the right posterior segment of the liver with a density of+56 Hounsfield units. Dynamic CT scan showed homogeneous enhancement 10 seconds after the intravenous injection of contrast medium, which was washed out after 60 seconds. Ultrasonography demonstrated a hyperechoic mass, inside which was an inhomogenous oval. The T1-weighted MR image showed an area of low intensity, which the T2-weighted image showed high intensity. Hepatic arteriography showed a hypervascular mass. Hepatic focal nodular hyperplasia was suspected preoperatively, and partial hepatic resection of the right posterior segment was performed. The cut surface of the tumor was dark reddish with a well-defined margin without capsule. The pathological diagnosis was hepatic angiomyolipoma. This case presented a non-specific hypervascular tumor, because of the very small fat component, which made preoperative diagnosis difficult.

Key words
angiomyolipoma, liver tumor

Reprint requests
Yuichi Machiki Department of Surgery, Sakashita Hospital
1665-1, Sakashita-cho, Ena-gun, Gifu 509-92 JAPAN

Accepted
September 8, 1993

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