Hepatic
angiomyolipoma is a rare hepatic mesenchymal
tumor. We report a case of hepatic
angiomyolipoma that was successfully resected along with a giant
hemangioma. A 53-year-old Japanese woman was admitted to our hospital for further evaluation of a liver
tumor in segment 4. The
tumor was detected on positron emission tomography during a health check-up. Abdominal ultrasonography revealed a well-defined mass of mixed echogenicity, 1.5 cm in diameter, in segment 4, and a giant
hemangioma of mixed echogenicity, 7 cm in diameter, in segment 7. On enhanced computed tomography, the
tumor in segment 4 showed hyperattenuation in the early phase and hypoattenuation in the delayed phase. On magnetic resonance imaging, the
tumor in segment 4 showed hypointensity on T1-weighted images, hyperintensity on T2-weighted images, and hyperintensity on diffusion-weighted images. On angiography, the
tumor in segment 4 appeared as a circumscribed hypervascular mass in the early phase and a slightly hypovascular mass in the delayed phase. The imaging findings suggested a primary
hepatocellular carcinoma. The patient consented to resection of the
tumor in segment 4 along with the giant
hemangioma in segment 7. These
tumors were resected with
tumor-free
surgical margins by partial resection of segments 4 and 7 of the liver. The cut surface of the resected specimen of segment 4 showed a yellowish
tumor consisting of mature adipose tissue. The histopathological diagnoses of the resected specimens were
angiomyolipoma in segment 4 and
cavernous hemangioma in segment 7. The
tumor in segment 4 consisted of mature lipocytes with angiomatous and small lymphocytic components, but no mitotic figures. The
tumor showed immunoreactivity to smooth muscle
antigen and
homatropine methylbromide 45 and no immunoreactivity to AE/E3. The postoperative course was uneventful, and the patient remains well 1 year after the operation.