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Pyoderma gangrenosum Synonyms Phagedena goemoetrica Dermatitis gangrenosa Malignant pyoderma Presentation stereotypical Age and sex Adults of both sexes Distribution of lesions Localized usually to the lower extremities; widespread episodically Individual lesions Pustule initially, ulcer with rolled undermined borders later, and a scar, often atrophic, still later Course Exacerbations and remissions for many years Variations clinical […]