Pyoderma gangrenosum. A complication of ulcerative colitis.
D000293:Adolescent; D001327:Autoimmune Diseases; D001361:Avitaminosis; D003093:Colitis, Ulcerative / Q000150:complications*; D006801:Humans; D008297:Male; D011711:Pyoderma / Q000150:complications*