[The problem of pyoderma gangrenosum].
D000328:Adult; D003093:Colitis, Ulcerative / Q000150:complications*; D005260:Female; D005734:Gangrene / Q000150:complications*; D006801:Humans; D006942:Hypergammaglobulinemia / Q000150:complications; D008297:Male; D008875:Middle Aged; D011087:Polycythemia Vera / Q000150:complications*; D011711:Pyoderma / Q000150:complications*