Deep dermatophytosis: report of 2 cases and review of the literature.

Skin infections due to dermatophytes are common and generally associated with a low degree of morbidity in normal hosts. Rare cases have been reported in which the dermatophyte invaded the deep dermis, subcutis, or even internal organs. Two patients, each of whom had clinical and histological findings of a deep or locally invasive dermatophyte infection, are described. This condition typically presents as a nodular eruption that is characterized histologically by suppurative granulomatous inflammation and deposition of organisms in the reticular dermis. Recognition of the potential of dermatophytes for local invasion in susceptible hosts will help ensure proper diagnosis and timely intervention in these cases.