There are five main subtypes of hepatocellular adenoma: HNF1a-inactivated HCA (HHCA), Inflammatory HCA (IHCA), β-catenin-activated HCA (BHCA), Sonic Hedgehog HCA (shHCA), and less than 5% of HCA will be unclassified because of the absence of molecular abnormalities or immunohistochemistry markers [4]. Here, HNF1A is linked to hepatocellular adenoma.