Pyoderma gangrenosum with IgA gammopathy.

A 46-year-old man with pyoderma gangrenosum and IgA gammopathy is described. This patient had no other identifiable associated systemic disease. His condition was unresponsive to oral corticosteroids, sulfones, and sulfapyridine therapy. His course was complicated by chronic sinusitis and necrotizing pneumonia. He was treated with clofazimine.