Violaceous-rimmed ulcers.

A 40-year-old man presented with a violaceous-rimmed ulceration on his inner thigh. He complained of crusting and drainage, but the lesion was otherwise asymptomatic. It began as a pimple, expanded into a small erosion, and then progressed to an ulceration (Figure). Medications at the time of presentation included prednisone and delayed-release mesalamine. Figure Violaceous-rimmed ulceration on the inner thigh. What is the diagnosis? What are the therapy options? DIAGNOSIS: Pyoderma gangrenosum (PG) associated with Crohn's disease.