[Pyoderma gangraenosum after implantation of a shoulder endoprothesis].

Pyoderma gangrenosum is an inflammatory, ulcerative, neutrophilic dermatosis that is clinically characterized by rapidly evolving, painful, necrotic skin lesions. It is typically associated with chronic systemic inflammatory or neoplastic diseases, but may also occur secondary to cutaneous injury or surgery (pathergy). Post-surgical pyoderma gangrenosum typically develops around surgical sites within the immediate postoperative period, mimicking early wound infection. However, common treatment strategies including antibiotics and debridement fail to improve or even worsen symptoms. Postoperative pyoderma gangrenosum has been most commonly reported from breast and visceral surgery. We present a case of postoperative pyoderma gangrenosum following total shoulder arthroplasty.