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Longitudinal evaluation of liver stiffness and outcomes in patients with chronic hepatitis C before and after short- and long-term IFN-free antiviral treatment

Abstract Background: New direct-acting antiviral drugs can eradicate hepatitis C virus (HCV) infection in over 90% of patients and can even reduce the risk of complications in advanced fibrosis/cirrhosis. The aims of this study were to evaluate (1) changes in fibrosis during and after antiviral treatment and (2) incidence of hepatocarcinoma and mortality in various fibrosis stages. Methods: This is a longitudinal monocentric prospective study. Blood and instrumental examinations were evaluated at baseline, at the end of therapy, and 1 and 2 years following treatment. Results: Two hundred and ninety-six patients with chronic HCV were evaluated, of whom 115 were experienced, 181 were treatment-naïve, and 2 had previous hepatocellular carcinoma (HCC) and were therefore excluded from the study. At baseline, stiffness values were 13.46 ± 9.97 kPa. Out of the 294 HCV patients enrolled, 100 had lymphoproliferative disorders and were evaluated separately. This group of patients showed stiffness values pertaining to the F0–F2 group (mean stiffness values were 6.07 ± 1.68 kPa). All other patients showed stiffness values pertaining to the F3–F4 group (mean stiffness values were 17.93 ± 10.23). No statistically significant difference was found between stiffness at baseline compared to the end of treatment (EOT), while significant differences were found between the baseline, 1 year (p = .05), and 2 year follow-ups (p < .01). Significant differences were found between baseline and EOT, as well as 1 and 2 years after the end of treatment (p < .001) in the F3–F4 group. Four out of 140 patients with baseline cirrhosis developed HCC during the post-treatment follow-up, 1 of whom died. Conclusions: Non-invasive methods provide important prognostic information, particularly concerning the observed regression of fibrosis and could be extremely useful for monitoring patients with long life expectancies after direct-acting antiviral treatment.