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Figure 1 .
(A) Preoperative appearance of the swollen and erythematous left leg with purpura, skin ulcer, and bullae formation. (B) Light micrograph of skin biopsy specimens including superficial fascia. The arrow indicates thrombosis of subdermal blood vessels. Arrowheads denote epidermal detachment. Blisters show massive inflammatory cell infiltration in subcutaneous tissue and superficial fascia. (Haematoxylin and eosin, original magnification x200.)