Erythema elevatum diutinum

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Erythema elevatum diutinum

a chronic symmetrical eruption of flattened nodules, of a pinkish or purplish colour, occurring in plaques on the buttocks and extensors of wrists, elbows, and knees, becoming fibrotic and finally scarring; early lesions show necrotizing vasculitis with fibrinoid or lipid deposits in vessel walls.

Synonym: Bury's disease.