title: Bullous haemorrhagic ulceration, a variant of pyoderma gangrenosum.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011711:Pyoderma; D012872:Skin Diseases, Vesiculobullous