Hepatitis C virus (HCV) infection is the most common chronic blood-borne viral infection in the United States. Well-described cutaneous manifestations of HCV infection include polyarteritis nodosa, porphyria cutanea tarda, type II cryoglobulinemia-associated vasculitis, pruritus, erythema nodosum, urticaria and urticarial vasculitis, lichen planus, and erythema multiforme. First described in 1996, necrolytic acral erythema (NAE) is now recognized as a cutaneous acral eruption uniquely associated with HCV infection. Most patients present with chronic, acral, erythematous, and psoriasiform lesions. Acute presentations of NAE are rare and patients may present with atypical clinical features; in these cases, suspicion for HCV infection may be delayed for weeks to months until more classic chronic lesions develop. In many cases, NAE presents before the patient has been diagnosed with HCV infection, which allows dermatologists the unique opportunity to suspect and diagnose HCV infection based on skin findings alone.
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