Abstract
A number of risk factors appear to play a role in Hepatocellularcinoma (HCC), HBV infection being one of the most important. Chronic inflammation and cytokines are key determinants in the development of fibrosis and liver cell proliferation. HBV DNA integration and/or expression of HBV proteins may have a direct effect on cellular functions. Occult hepatitis B virus infection is characterized by persistence of HBV DNA in hepatitis B surface antigen-negative individuals. There are evidences that occult HBV is a risk factor for the development of HCC and that the potential mechanisms whereby overt HBV might induce tumour formation are mostly maintained.
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