Does a chronic hepatitis B or C infection increase your risk of liver cancer?
Yes, a chronic hepatitis B or C infection strongly and demonstrably causally increases your risk of liver cancer. Get tested and treated if you carry the virus, and ask your doctor about periodic surveillance.
Both chronic hepatitis B and hepatitis C infection substantially increase the risk of liver cancer. Hepatitis B raises that risk by a factor of 12.5, and hepatitis C by a factor of 11.2, compared with uninfected individuals. Together, these two viruses account for the vast majority of all liver cancer cases worldwide, with hepatitis B alone responsible for approximately 55 percent.
With hepatitis B, the amount of virus in the blood plays a major role. People with a very high viral load face a nearly 15 percent chance of developing liver cancer over a period of just over eleven years. At a low viral level, that figure is only 1.3 percent. This relationship holds regardless of other factors such as smoking, alcohol use, or liver cirrhosis. Hepatitis B is also distinctive in that it can integrate its genetic material directly into liver cells, meaning it can cause cancer even without cirrhosis. In hepatitis B with cirrhosis, the annual risk rises to 3.7 percent in Asians and 2.2 percent in Europeans.
Treatment helps, but does not fully resolve the problem. Antiviral therapy for hepatitis B with cirrhosis reduces the ten-year risk of liver cancer from just over 37 percent to around 23 percent, a reduction of nearly 60 percent. Nevertheless, the risk persists afterwards: regular surveillance for liver cancer remains necessary for everyone with hepatitis B and cirrhosis, even after successful treatment. For hepatitis C, modern antiviral agents now offer the prospect of substantial risk reduction, although the sources used contain less quantitative evidence for this.
The best protection against hepatitis-B-related liver cancer is vaccination. Taiwan demonstrated that a population-wide vaccination campaign genuinely reduced the number of liver cancer cases in young people. Those who are already infected and also have hepatitis C, or who have higher concentrations of the hepatitis B surface protein in their blood, face an even greater risk than with a single infection.
All claims are based on multiple PMIDs, including large cohort studies, meta-analyses, and guideline documents (PMID 39834076, 27742009, 21563647, 16391218, 32129773). The causal relationship between HBV and HCV and HCC is considered established in the literature.