Pyoderma ganrenosum : about 4 cases with revised literature.

Abstract

Pyoderma gangrenosum (PG) is a rare neutrophilic dermatosis, of uncertain etiology; It is charac­ terized by aseptic and chronic cutaneous ulcerations. It is sometimes associated with a systemic disease, essentially, digestive, rheumatic or haematological. We report 4 observations of PG which presented a diagnostic and/or therapeutic problem