BACKGROUND 95% CI, 15.81-16.90) and extrahepatic cancers (aHR 1.14; 95% CI, 1.12-1.16). Notably, expanding the endpoint to include 2nd cancers increased the aHR for extrahepatic cancer from 1.09 to 1.14, indicating that traditional analyses underestimate the true burden. Significant risk elevations were observed for haematological, biliary, pancreatic, and renal cancers. In the DAA sub-cohort analysis using the time-dependent model, DAA treatment significantly reduced the risk of intrahepatic cancer (aHR 0.54-0.61) and extrahepatic cancers (aHR 0.77) after adjusting for competing risks. CONCLUSIONS: HCV infection significantly increases both intrahepatic and extrahepatic cancer risks. Excluding 2nd cancer underestimates this burden. Given that DAA therapy significantly reduces the risk of both intrahepatic and extrahepatic cancers, accelerating HCV elimination policies is imperative.
Park et al. (2026) studied this question.