Derm Dx: Annular, erythematous patches

A 69-year-old woman requests a second opinion because of a persistent skin condition. Her eruption had been present for months and was resistant to a variety of topical medications, including antifungals. The patient’s medical history was positive for type 2 diabetes and arthritis. Physical examination revealed multiple annular, erythematous patches and plaques scattered on the upper and lower extremities and ...