Hepatoblastoma is a rare malignant (cancerous) tumor of the live, usually affecting young children. In early stages of the condition, there may be no concerning signs or symptoms. As the tumor gets larger, affected children may experience a painful, abdominal lump; swelling of the abdomen; unexplained weight loss; loss of appetite; and/or nausea and vomiting. The exact underlying cause of Hepatoblastoma is poorly understood. Risk factors for the tumor include prematurity with a very low birth weight, early exposure to hepatitis B infection, biliary atresia, and several different genetic conditions (i.e. Beckwith-Wiedemann syndrome, familial adenomatous polyposis, Aicardi syndrome, Glycogen storage disease, and Simpson-Golabi-Behmel syndrome).