Oral-contraceptive-associated liver tumours: occurrence of malignancy and difficulties in diagnosis.

Seven of ten women with oral-contraceptive-associated liver tumours were found to have hepatocellular carcinoma. The diagnosis was often delayed, although hepatomegaly was always present on examination, and liver-function tests and erythrocyte sedimentation-rates were abnormal in most cases. Other investigations, including routine technetium liver scans and biopsy, were sometimes misleading. There were important differences in alpha-fetoprotein concentration, vascularity on angiography, and survival between liver tumours in pill users and non-users.