
As Drs. Nakakura and Choti point out, the incidence of hepatocellular carcinoma (HCC) is rising in many countries including the United States, mainly as the result of a steady increase in hepatitis C infections. Unfortunately, it now seems that the hepatitis C virus is more carcinogenic than the hepatitis B virus, judging from the frequency with which HCC develops among patients with hepatitis C- vs hepatitis B-induced cirrhosis.[1] Numerous studies have demonstrated changes in various oncogenes and tumor suppressor genes, but no consistent sequence of genetic changes has emerged similar to the adenoma-carcinoma sequence in colon cancer.