Additionally, there are two variants of HCC in the pediatric age group: the first is hepatocellular malignant neoplasm not otherwise specified (previously referred to as transitional liver cell tumor), which is composed of both hepatoblastoma and HCC components; the second is fibrolamellar HCC, which typically presents with normal alpha-fetoprotein levels and accounts for almost 30% of HCCs in people younger than 20 years [89–91]. Here, AFP is linked to hepatocellular carcinoma.