Pyoderma gangrenosum at surgery sites.

Pyoderma gangrenosum is a necrotizing and ulcerative skin disorder often associated with underlying systemic diseases. The etiology remains obscure, with recent investigations emphasizing an altered immune system. A case report is presented of pyoderma gangrenosum occurring at surgical sites in the absence of predisposing factors. Pyoderma gangrenosum in this setting can mimic infectious causes of wound necrosis. Early recognition of the characteristic lesion morphology may prevent unnecessary treatment directed toward infectious agents and facilitate effective control with systemic corticosteroid therapy.