See below: Urticarial vasculitis unlike the usual urticarial is an immune complex disease in which the lesions last and can be idiopathic; a reflection of underlysing disease such as lupus, sjogrens syndrome,or familial hypocomplementemai. It can also be seen in hepatitis and C and serum sickness due to drugs. Biopsy usually shows leucocytoclastic vasculitis. To further explain. would take pages.
Answered 5/23/2016
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