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Background:Incidence of NAFLD(nonalcoholic fatty liver disease) is increasing as a cause of chronic liver disease.Also,obesity and diabetes are risk factors for the development of hepatocellular carcinoma(HCC).Past hepatitis B virus infection has been considered as major cause of non-viral hepatitis(NBNC) and nonalcoholic(NA) HCC.The aim of this study is to investigate the etiologies and prevalence of NBNC-NA HCC.