Hepatoblastoma NCIT:C3728 UMLS:C0206624 SNOMEDCT_US:45024009 SNOMEDCT_US:109843000 Hepatoblastoma occurs nearly exclusively in infants and children. A kind of neoplasm of the liver that originates from immature liver precursor cells and macroscopically is composed of tissue resembling fetal or mature liver cells or bile ducts. Neoplasm of the liver Embryonal neoplasm