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Key Points Erythema elevatum diutinum (EED) is a rare chronic form of fibrosing vasculitis. Firm, red to brown or violaceous nodular lesions developing over joints of the elbows, knees, hands, and feet, often in a symmetric pattern, is the hallmark cutaneous lesion. EED has been associated with HIV/AIDS, hematologic disorders (IgA monoclonal gammopathy, multiple myeloma), […]