Jonathan S. Crane, DO

For about 10 years, a 26-year-old man had recurring cystic lesions on his scalp that would periodically enlarge, shrink, and occasionally drain. One lesion had been excised by another physician, but it later recurred. The patient had been taking minocycline (100 mg) daily for this condition.

Telltale skin lesions of syphilis, gonorrhea, human papillomavirus infection, and Haemophilus ducreyi infection.

A 34-year-old woman presented with a blistering, intensely pruritic rash that had erupted 3 days earlier. Multiple papular lesions were densely clustered on areas of exposed skin. Excoriations were present, but there was no evidence of bacterial infection.

For 6 years, a 32-year-old man had a recurring rash on his back, shoulders, and chest. He stated that the rash appears in the spring, itches, and enlarges into ringlike areas. Previously, when treated with cephalexin, the rash had cleared within several weeks. Antifungal medication (econazole cream and oral terbinafine) had failed to resolve the rash.