Previously, Rebouissou and colleagues have established clinical-based study spanning over a decade including 40 human hepatocellular adenomas (HCAs) that are linked with the inactivated or mutated HNF-1α expression, 25 non-steatotic non-tumor livers, and 11 steatotic non-tumor livers. The gene discussed is HNF1A; the disease is hepatocellular adenoma.