[Increased occurrence of oral lichen planus in hepatitis C infection].

The present study evaluated the risk of hepatitis C virus-infected (HCV) patients in Germany to develop oral lichen planus (OLP). We screened 127 patients with chronic HCV-infection for OLP. In three of 127 patients (2.4%) OLP was found. Twenty-four patients with OLP were examined for hepatitis C. Only one patient (4.2%) was positive for HCV-RNA. Our data show no increased prevalence for OLP in German patients infected with HCV. Also no increased rate of HCV infection in OLP patients was found in this study. Further studies of HCV-infected patients from different geographical areas and ethnic groups are necessary to determine the rate of OLP in HCV-infection and to clarify whether HCV acts locally to develop OLP, or whether host immune response to HCV is of importance.