Cutaneous malasseziasis: four case reports of atypical dermatitis and onychomycosis caused by Malassezia.

BACKGROUND

This study investigates four special cases associated with Malassezia.

METHODS

The special clinical manifestations, mycologic examination, and treatment were reviewed intensively.

RESULTS

An abundance of Malassezia hyphae were found in the scales of the three cases presenting with erythematous patches and in another case presenting with dystrophic nails. Malassezia globosa was identified and confirmed by culture. Antifungal agents were effective in the treatment of all cases.

CONCLUSIONS

Malassezia is an opportunistic fungus that may induce dermatosis other than classical pityriasis versicolor. Hyphae from the lesions may be induced by a change in the microenvironment of the fungus caused by the local application of corticosteroids.