Pyoderma gangrenosum (PG) is a chronic dermatosis with peculiar characteristics and unknown etiology, often of difficult diagnosis. It manifests as painful skin ulcers with rapid and progressive evolution, most commonly in the lower limbs. Ulcerations can occur spontaneously or after various types of trauma. The period between the onset of the lesions and the correct diagnosis is often prolonged. There is no standard treatment or simple algorithm for the choice of therapy. In this article, we present a comprehensive review of the current literature on the pathophysiology, diagnosis, and treatment of this pathology through systematic analysis of the current references in the databases PubMed, Scielo, Medline and Lilacs.
pyoderma gangrenosum; skin ulcer; differential diagnosis