Abstract
A surgical case of hepatic angiomyolipoma is reported. This case is a 59-year-old woman whose tumor was found incidentally by an ultrasonogram. At laparotomy, the tumor was present in the lower edge of the left lobe of the liver, measured 3×2×2cm in diameter and appeared solid, well-demarcated and dark red. Histologically, it consisted of abundant blood vessels of varying caliber, mature fat cells and round, spindle or epithelioid interstitial cells. The interstitialcells were considered to be of smooth muscle origin, because myofilamentous structures were demonstrated ultrastructurally in their cytoplasm and because they were positive for anti-desmin antibody by PAP method. From these findings, the tumor was diagnosed as angiomyolipoma. Although renal angiomyolipoma is not uncommon, there are only 14 cases of hepatic angiomyolipoma in the world literature. In spite of their histological resemblance, distinctive clinicopathological differences between both tumors are recognized.
