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Dermatophytid Reaction

Dermatophytid (identity or id) reactions are inflammatory reactions to dermatophytosis at a site distant from the primary infection. The reaction takes multiple forms and may manifest as vesicles, papules, erysipelas-like plaques, erythema nodosum, erythema annulare centrifugum, or urticaria.

Image courtesy of the Public Health Image Library of the Centers for Disease Control and Prevention.