A case of perineal ecthyma gangrenosum.

Ecthyma gangrenosum is a skin lesion associated with Pseudomonas aeruginosa. A previously healthy one-year-old boy who had been diagnosed with varicella 10 days ago was admitted to our hospital with complaints of diarrhea, green ear discharge and new lesions in the diaper area. Intravenous meropenem and amikacin had been previously initiated. Physical examination revealed greenish, well bordered necrotic ulcers on both gluteal areas and the perianal area. Pseudomonas aeruginosa grew in wound culture. A colostomy was opened due to recalcitrant diarrhea and ulcers. The patient remitted in one month and was discharged. T lymphocyte subgroups and immunoglobulins were found to be normal on immunologic evaluation. We presented this case to draw attention to the fact that ecthyma gangrenosum due to Pseudomonas aeruginosa may occur in the diaper area and that sepsis due to Pseudomonas should be investigated.