UPMC Liver Cancer Center

Liver mass or lesion	Overview
Hemangiomas (also called hemangiomata)	the most common benign solid lesions of the liver represent congenital vascular lesions that contain fibrous tissue and small blood vessels that eventually grow range in size from small (1 centimeter or less) to giant, cavernous hemangiomas (10 to 20 centimeters) spontaneous rupture (bleeding) is rare
Hepatic adenomas	benign solid neoplasms of the liver most commonly seen in young women typically solitary, although multiple adenomas also can occur risk factor: prior or current use of oral contraceptives, although can occur even without oral contraceptive use carry significant risk of spontaneous rupture with intraperitoneal bleeding and risk of becoming cancerous (hepatocellular carcinoma)
Focal nodular hyperplasia (FNH)	another benign solid lesion of the liver more common in women of childbearing age (similar to adenomas), although the link to oral contraceptive use is not as clear usually do not rupture spontaneously carry no significant risk of becoming cancerous
Hepatic cysts	fluid-filled structures of the liver different types of hepatic cysts include: simple liver cysts biliary cysts parasitic cysts cystadenomas

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