title: Pyoderma gangrenosum: a reappraisal of associated systemic diseases.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000150:complications; D003093:Colitis, Ulcerative / Q000150:complications; D003424:Crohn Disease / Q000150:complications; D006801:Humans; D011711:Pyoderma / Q000209:etiology* / Q000628:therapy; D012883:Skin Ulcer / Q000209:etiology* / Q000628:therapy