Annular plaques on the foot, shin, hand

A woman, aged 26 years, presents with circular rashes that developed 3 months earlier. She reported that the rashes first appeared as raised pink bumps, but soon after they formed a more circular shape.

Her primary-care physician treated the rashes for ringworm with the topical antifungal ketoconazole, but they did not improve. The patient is otherwise healthy, taking only an ...