- A malignant tumor of the liver. Hepatoblastoma occurs almost exclusively in young children, more commonly in boys than in girls. The diagnosis of hepatoblastoma is usually made after abdominal swelling (from liver enlargement caused by the tumor) is noticed. Although small tumors can sometimes be treated successfully with surgery, the prognosis with hepatoblastoma is generally poor.
* * *A malignant neoplasm occurring in young children, primarily in the liver, composed of tissue resembling embryonal or fetal hepatic epithelium, or mixed epithelial and mesenchymal tissues.
* * *he·pa·to·blas·to·ma -blas-'tō-mə n, pl -mas also -ma·ta -mət-ə a malignant tumor of the liver esp. of infants and young children that is composed of cells resembling embryonic liver cells
* * *n.a malignant tumour of the liver occurring in children, made up of embryonic liver cells. It is often confined to one lobe of the liver; such cases may be treated by a partial hepatectomy.
* * *hep·a·to·blas·to·ma (hep″ə-to-blas-toґmə) a malignant intrahepatic tumor occurring in infants and young children and consisting chiefly of embryonic hepatic tissue.
Hepatoblastoma, composed of cuboidal cells that resemble fetal hepatocytes embedded in a mesenchymal matrix.
Medical dictionary. 2011.