Urticarial vasculitis - rare autoimmune dz w/ persistent edematous papules & plaques lasting >24 hrs, w/ systemic Sxs (joint pain, fever). Long-lasting skin lesions tend to leave a bruiselike look. Requires Bx show leukocytoclasticl vasculitis https://t.co/cFWrntrlMw https://t.co/JPkh5FVNo3