Erythema elevatum diutinum with unusual clinical appearance.

Erythema elevatum diutinum is a rare chronic inflammatory skin disease of unknown etiology with a histopathology of a leukocytoclastic vasculitis. Clinical findings involve symmetrical livid-erythematous to red-brown papules and plaques or nodules which are initially soft but become firmer. The skin lesions are located over extensor surfaces and often over joints. Early treatment with dapsone, corticosteroids and antibiotics is sometimes effective. A patient with multiple myeloma displayed unusual lesions of erythema elevatum diutinum.