The cumulative survival rates of all resection cases over 5 years in the NBNC, HBV and HCV groups were 54, 53 and 47%, respectively; the differences were non-significant (NS). Continuous line, HCV; short dotted line, NBNC; and long dotted line, HBV. NBNC, hepatitis B surface antigen (HBs)-negative and HCV antibody-negative patients; HBV, hepatitis B surface antigen-positive patients; HCV, hepatitis C virus antibody-positive patients.