The hepatitis C virus causes both hepatic and extrahepatic disorder, p
articularly as regards dermatology. The link between essential mixed c
ryoglobulinemias and the C virus infection has bee clearly evidenced,
whereas its frequency seems low in other systemic vasculitis such as p
olyarteritis nodosa. Similarly, the link between C virus hepatopathy a
nd porphyria cutanea tarda is now proven. Lichen planus is also descri
bed as being associated with this virus, but further epidemiological s
tudies are required to determine the exact prevalence of lichen in C v
irus hepatopathy cases. Finally, various cutaneous disorders, such as
urticaria, erythema multiforme, dermo-hypodermitis, etc, occasionally
arise during acute or chronic hepatitis C.