A 66-year-old woman with poor peripheral circulation complained of yellow scaly nails and progressive scaly red patches on the bottom and sides of both feet. She was treated successfully with oral terbinafine 250 mg tablet daily for 3 months. Tinea Unguium (Onychomycosis) is mycotic infection of the nail unit. The term tinea unguium is used to describe infection by dermatophytes; the term onychomycosis is nonspecific and refers to nondermatophytes and dermatophytes infections of the nail unit. Tinea unguium is generally caused by members in the genera Trichophyton and Epidermophyton and is most common in adults. T. Rubrum causes the majority of infection.
confluent red scaly plaque with well demarcated border and friable yellow nails with subungual scale