Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Hepatocellular carcinoma, childhood ?
    ### Response:
    What causes hepatocellular carcinoma, childhood? A review of the literature suggests that knowledge regarding the cause of hepatocellular carcinoma in children is lacking due to the rarity of this disease.  Children living in regions of the world where heptatitis B virus is common have been reported to have a much greater risk of developing this disease.
    