“…The minimal criteria required for diagnosis of UV are leukocytoclasia or fibrin deposits with or without extravasated red blood cells, features which can be subtle and overlap with the histologic findings seen in cutaneous leukocytoclastic angiitis (Black, 1999). There is a wide spectrum of histologic findings in UV, ranging from sparse neutrophilic infiltrate of small vessels to more severe lesions with a dense neutrophilic vasculitis, leukocytoclasia, extravasated red blood cells, endothelial cell swelling and fibrin deposits (Jones et al, 1983). The superficial and mid-dermal vessels are most commonly affected, however, vascular destruction can extend into the deep dermal and pannicular vessels (Davis et al, 1998;Mehregan et al, 1992).…”