Tinea incognito due to Trichophyton rubrum responsive to topical therapy with isoconazole plus corticosteroid cream

Trichophyton rubrum has become a prevalent cause of dermatophyte infection in Italy. About 4000 patients a year are seen at our clinic: approximately 500 presenting with T. rubrum dermatomycosis each year. Typical clinical manifestations are rarely inflammatory and usually present as tinea corporis or tinea unguium. Tinea incognito describes a mycotic infection in which the underlying clinical morphology has been modified by the application of topical or systemic corticosteroid, which can cause diagnostic and therapeutic delay.