Age, sex, treatment modality, tumor factors, including size, number of nodules, lobar distribution, and presence of extrahepatic metastasis, clinical manifestations, including ascites and hepatic encephalopathy, bilirubin, prothrombin activity, AST, ALT, platelet count, AFP, positivity for viral markers (hepatitis B surface antigen and anti-hepatitis C antibody), alcohol. This evidence concerns the gene F2 and neoplasm.