Hepatitis C virus infection in the development of hepatocellular carcinoma in cirrhosis

Background/Aims: The role of hepatitis C virus replication and different genotypes in the progression of cirrhosis to hepatocellular carcinoma is examined on the basis of a prospective follow-up of 1438 patients with histologically proven cirrhosis. Methods: The presence of HCV RNA, anti-HCV and characterisation of virus genotypes were determined in 72 cases who developed hepatocellular carcinoma after a median follow-up of 5.3 years range 1 to 16) and compared to 72 controls who had cirrhosis only, after a median follow-up of 4.8 hears (range 1 to 16). Patients in the hepatocellular carcinoma group and controls were matched, one to me, for age, sex, nationality, HBsAg seropositivity, duration of follow-up and aetiology of cirrhosis. Results: HCV RNA was detected in 31 of 72 (44%) patients who developed hepatocellular carcinoma, significantly more frequently than in 17 of 72 (23%) controls with cirrhosis (odds ratio 2.4, 95% confidence interval 1.2 to 5.0; p=0.013). When cirrhosis of different aetiologies was analysed, hepatitis C virus replication was more frequently detected in patients developing hepatocellular carcinoma in association with cryptogenic cirrhosis (p=0.007), alcoholic cirrhosis (p=0.043) and hepatitis B virus seronegative cirrhosis (p=0.05). Hepatitis C virus genotypes 1b and 4 were the most prevalent; they were found in 53% and 25%, respectively, of the patients studied, but were equally distributed between cirrhosis progressing to hepatocellular carcinoma and controls. Conclusions: Persistent hepatitis C virus replication is closely associated with hepatocellular carcinoma development in cirrhosis, and there is no preferential role of individual hepatitis C virus genotypes.