Complete regression of hepatocellular adenoma after withdrawal of oral contraceptives.

A 28-year-old woman who complained of mild abdominal pain was found to have a large liver tumor. Angiography and needle biopsy established the diagnosis of hepatocellular adenoma. The tumor was felt to be unresectable because of its size, and no treatment was given other than withdrawal of oral contraceptives. Subsequent hepatic scintiscans documented compete resolution of the tumor over a 12-month period.