The paper describes a clinical case of pulmonary vasculitis caused by hepatitis C virus (HCV). Its diagnosis was established on the basis of in-depth laboratory testing and an investigation of the molecular biological markers of viremia (polymerase chain reaction - PCR - HCV RNA) in peripheral blood mononuclear cells. By taking into account of extrahepatic HCV replication and contraindications to interferon therapy, the female patient was given an interferon-free antiviral therapy cycle using an interferonogenic inductor in combination with ribavirin. Pathogenic therapy (methylpred and ursodeoxycholic acid) was additionally performed. An interferon-free regimen of cycloferon + ribavirin led to sustained remission of HCV infection running with its systemic manifestations. The therapy could improve the function of not only the liver, but also the lung. In suspected extrahepatic HCV infections, an investigation of molecular biological markers for viremia (HCV RNA PCR) in the peripheral blood mononuclear cells is an essential diagnostic technique. Interferonogenic inductors, cycloferon in particular, should be used in combination with ribavirin when a chronic hepatitis C patient with the extrahepatic manifestations of HCV infection has contraindications to conventional therapy with recombinant interferon-.