Ecthyma gangrenosum associated with Proteus bacteremia.

Ecthyma gangrenosum is an exceedingly rare dermatologic complication of bacteremia or fungemia in immunocompromised patients. The lesions may be single or multiple and may occur anywhere on the body. We present a case of ecthyma gangrenosum with atypical organisms and risk factors resulting in delayed diagnosis of both the condition and the underlying infectious process that caused it. Despite the atypical findings, the diagnosis was confirmed by biopsy and tissue culture.