Giant hemangiomas of the liver with the diameter of more then 10 cm are likely to grow rapidly with bleeding in tumor and concur a terrible complication such as heavy bleeding caused by tumor rupture. We experienced a case of giant hemangioma of the liver with a pronounced extrahepatic growth. A 33-year-old woman consulted a doctor because of common cold and was pointed out having hepatomegaly. She was admitted to the hospital for further examination. Abdominal ultrasonography showed a heterogenous high echoic tumor with even surface lying ventral to the gallbladder from the margin inferior hepatis. Abdominal CT scan showed a low density tumor which growed from S4, 5 and 6 of the liver to extrahepatic area. The tumor was confirmed to show low intensity on T1-weighted images and remarkable high intensity on T2-weighted images on a magneticresonance imaging scan and had strong contract effect from the edge by a contract medium. It showed cotton wool like appearance on an angiography. It was diagnosed as hemangioma of the liver and a partial hepatic resection was conducted. The resected tumor was rubiginous, spongy, 11×5.5×7.5 cm in size and 660g in weight. Histopathologically, it was diagnosed as cavernous hemangioma
