Necrolytic Acral Erythema

Abstract

A 46‐year‐old hepatitis C‐positive African American woman presented with a several month history of worsening, well‐marginated, erythematous, dusky plaques on the dorsum of her feet and ankles. After an initial skin biopsy showed spongiotic dermatitis, she was treated with emollients, high potency topical steroids, and keratolytics, all of which were of no benefit. A punch biopsy from the dorsum of her foot showed acanthosis, individual keratinocyte necrosis, confluent upper epidermal necrosis, and a superficial and deep perivascular lymphocytic infiltrate. Given the patient's positive hepatitis C status and clinicopathological correlation, a diagnosis of necrolytic acral erythema was rendered. Empiric therapy with oral zinc sulfate was initiated despite a normal plasma zinc level, and the skin lesions resolved with post‐inflammatory hyperpigmentation. Necrolytic acral erythema, considered one of the necrolytic erythemas, is a cutaneous manifestation of hepatitis C virus infection. A total of nine cases have been reported in the literature, seven from Egypt and two from the United States. All reported patients have been hepatitis C positive. This case represents the third reported patient from the US with necrolytic acral erythema.