Fig. 2. Histopathological findings. A histopathological evaluation confirms the dermal perivascular inflammation and edema with superficial epidermal pustule formation (A). Red blood cell extravasation and variable fibrinoid necrosis (asterisk) of vessel walls are shown (B). The blood vessels are surrounded by a dense inflammatory infiltrate composed of eosinophils (arrow) and lymphocytes (C). (A) H&E stain, ×100; (B) H&E stain, ×400; (C) H&E stain, ×400.
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