[Presentation of atypical bullous pyoderma gangrenosum].

Pyoderma gangrenosum (PG) is a rare, ulcerative skin disease. Atypical PG is characterized by rapidly evolving painful vesicles and enlarging bullae. Minor trauma or surgery is considered the cause in 25-50% of PG lesions. PG often mimics necrotizing infection and may therefore be inadequately treated. We present a patient with rapidly progressing bullous PG. The lesions were initially treated surgically, which led to exacerbation of the ulcers. A decision of surgery should be preceded by bacterial culture and microscopy and in case of uncertain diagnosis also by histopathologic examination.