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| Fig. 31.4 Dermatophytid reaction. (Courtesy of Mark Welch, MD.) |
Dermatophytid reactions are inflammatory reactions at sites distant from the site of the associated dermatophyte infection. Types of dermatophytid reactions from tinea pedis include urticaria, hand dermatitis (Fig. 31-4), or erythema nodosum. The pathogenesis of dermatophytid reactions is not fully understood, but evidence suggests that they are secondary to a strong host immunologic response against fungal antigens.
