Incidence of development of hepatocellular carcinoma in Japanese patients infected with hepatitis B virus is equivalent between genotype B and C in long term

J Viral Hepat. 2019 Jul;26(7):866-872. doi: 10.1111/jvh.13099. Epub 2019 Apr 23.

Abstract

Hepatitis B virus (HBV) genotypes B (HBV/B) and C (HBV/C) are the most prevalent genotypes among Japanese patients with hepatitis. Reportedly, HBV/C infection has been associated with more severe disease progression, manifesting as developing cirrhosis and hepatocellular carcinoma (HCC), than HBV/B infection. However, no long-term studies have examined the development of HCC in HBV/B-infected patients in Japan. The aims of our study were to compare the incidence of HCC in HBV/B- or HBV/C-infected patients. A total of 241 patients were followed up among 295 hepatitis B surface antigen (HBsAg)-positive carriers. Genotypes of HBV were A in 1% (4/295), B in 61% (179/295), C in 37% (110/295) and D in 1% (2/295) patients, and 96% of HBV/B were infected with subgenotype Bj. The mean age at HCC diagnosis was significantly higher in HBV/B than in HBV/C (67.0 ± 10.0 vs 57.7 ± 8.0 years, P < 0.001). The value of FIB-4 index was significantly higher in HBV/B than in HBV/C (P < 0.01). The rate of HCC was higher in HBV/C than in HBV/B, and a significant difference was observed until the 20-year observation period (P = 0.048). However, thereafter, HCC associated with HBV/B increased, and no significant difference was observed between HBV/B and HBV/C. HCC development was consistently observed even in HBV/B infection, especially among elderly patients with advanced fibrosis compared with HBV/C. HBV/B-infected patients developed HCC later in life, and in the long term, we found no differences in incidence of HCC development rates between these two genotypes.

Keywords: hepatitis B virus; hepatocellular carcinoma; viral genotypes.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Antiviral Agents / therapeutic use
  • Carcinoma, Hepatocellular / epidemiology*
  • Carcinoma, Hepatocellular / etiology*
  • DNA, Viral
  • Female
  • Genotype*
  • Hepatitis B Surface Antigens / blood
  • Hepatitis B virus / genetics*
  • Hepatitis B, Chronic / blood
  • Hepatitis B, Chronic / complications*
  • Hepatitis B, Chronic / drug therapy
  • Hepatitis B, Chronic / virology*
  • Hepatitis C / complications
  • Hepatitis C / epidemiology
  • Humans
  • Incidence
  • Japan / epidemiology
  • Liver Function Tests
  • Liver Neoplasms / epidemiology*
  • Liver Neoplasms / etiology*
  • Male
  • Middle Aged
  • Population Surveillance

Substances

  • Antiviral Agents
  • DNA, Viral
  • Hepatitis B Surface Antigens