Erythema elevatum diutinum: a clinicopathological study

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Abstract
Erythema elevatum diutinum is a syndrome of vasculitis in which lesions, typically over the extensor surfaces, show a mixed inflammatory infiltrate on biopsy. We describe a series of 13 patients. The most common association in our series was with hypergammaglobulinemia; both mono and polyclonal. Chronic infection, not streptococcal, was a less frequent finding although two of three patients had a positive reaction to the intradermal injection of streptococcal antigen. Dapsone remains the initial treatment of choice.

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