Postoperative pyoderma gangrenosum after gunshot wound: A case report.

Pyoderma gangrenosum (PG) is a rare neutrophilic dermatosis of unclear etiology that exhibits pathergy and can develop post-operatively in surgical incisions. To the best of our knowledge, this is the first case report of PG developing after a gunshot wound (GSW) injury or in a contaminated surgical wound. We further propose umbilical sparing as a key clinical finding differentiating the diagnosis of PG from more common infectious etiologies.