This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Pathology
All of the following statements are true regarding hepatoblastoma, except: 
Select and explain. 
A. A type of small round cell tumor, B. Most common liver tumor of early childhood, C. Activation of JAK-STAT pathway involved in pathogenesis, D. Associated with Beckwith-Wiedemann syndrome
C: Activation of JAK-STAT pathway involved in pathogenesis
Answer: C: Activation of JAK-STAT pathway involved in pathogenesis 
Explanation: Hepatoblastoma Most common liver tumor of early childhood. Rarely occurs over the age of 3 years. Activation of the Wnt signaling pathway is characteristic of hepatoblastoma. Associated with Beckwith-Wiedemann syndrome and familial adenomatous polyposis. It is a type of small blue round cell tumour with two histological subtypes - epithelial type and and mixed epithelial-mesenchymal type. Good prognosis.