Report of a case of a dermatophytoma successfully treated with topical efinaconazole 10% solution.

Onychomycosis is a common fungal infection of the nail unit that results in discoloration, subungual debris, thickening, onycholysis, and often pain and impairment of mobility. Dermatophytomas are characterized by a thick fungal mass within and under the nail plate and are especially resistant to treatment. Here we report a case of a patient with a dermatophytoma who had failed oral terbinafine but was successfully treated with efinaconazole 10% topical solution.