What is the prevalence of hepatocellular adenoma (HCA) in the US?

Updated: Feb 21, 2018
  • Author: Bradford A Whitmer, DO; Chief Editor: BS Anand, MD  more...
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Hepatocellular adenomas are extremely rare. The annual incidence is 1 to 1.3 cases per 1 million persons per year. However, 3-4 cases per 100,000 people per year occur among women who have had exposure to estrogen-containing OCPs. A 5-fold increased risk exists with 5-7 years of OCP exposure, and a 25-fold increased risk exists with longer than 9 years of OCP exposure.

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