Hepatocellular adenomas (HCAs) are also known as hepatic adenomas or liver cell adenomas. They are rare, benign tumors of presumable epithelial origin and occur in less than 0.004% of the population at risk.
Causes of hepatocellular adenoma include oral contraceptive medications containing mestranol as well as anabolic steroids. Thus, hepatocellular adenomas occur mostly in women of childbearing age and are strongly associated with the use of oral contraceptive pills (OCPs) and other estrogens