Abstract
Erythema elevatum diutinum (EED) is a rare cutaneous small vessel vasculitis of unknown etiology. It is thought to be due to immune complex deposition in small vessels, resulting in complement fixation and subsequent inflammation. EED classically presents with asymptomatic, symmetric, red-brown to purple papules, plaques, and nodules overlying extensor surfaces with a lapsing-remitting course that typically resolves within five to 10 years. We discuss the case of a 47-year-old male with HIV and a new history of EED presenting after several days of missed antiretroviral medications and resolved with improved compliance with antiretroviral medications. A 47-year-old male presented with a four-week history of mildly tender violaceous plaques and nodules on the dorsal feet and posterior heels bilaterally. Medical history was significant for HIV that was well-controlled on antiretrovirals although the patient had missed two days of therapy. A punch biopsy of the lesion demonstrated leukocytoclastic vasculitis with dense dermal mixed infiltrate consisting of histiocytes, neutrophils, and eosinophils. Laboratory findings revealed the presence of HIV RNA. Prior to the initiation of Dapsone therapy, the patient's eruption cleared entirely within a month solely by restarting his antiretroviral therapy, for which he continues to remain disease-free. EED is a rare, chronic leukocytoclastic vasculitis with a poorly understood etiology. Treatment is typically aimed at treating underlying systemic disease, however, treatment of EED with Dapsone is typically first-line.