Palabras clave: pioderma gangrenoso; enfermedades inflamatorias del intestino; colitis ulcerosa.

SUMMARY: Pyoderma gangrenosum is a chronic inflammatory disease, uncommon, with an incidence of 3 to 10 cases per million inhabitants, whose etiology remains unknown but has been associated with multiple systemic conditions in which stands out inflammatory bowel disease. So far, four clinical variants are known to be the most common ulcerative form of all. The diagnosis is mainly clinical and of discard. In histology its characterized by a neutrophilic infiltrate in the dermis. The treatment of choice is oral corticosteroids, although there are many other therapeutic options described. w e report a representative case of an ulcerative pyoderma gangrenosum associated with inflammatory bowel disease.