Journal of Rheumatic Diseases

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Fig. 1. Her skin lesions with papules and ulcers were shown on her left leg unilaterally (A), and the biopsy site was marked (B). The crust formation (asterisks) was found in the epidermis layer, and there were diffuse infiltrates of inflammatory cells (black arrows) in the upper dermis (x100 high power field [HPF]) (C). High magnification showed neutrophils, lymphocytes (black arrowhead) in the upper dermis, and thrombosis (green arrowheads) in capillaries, and red blood cell extravasation (yellow arrowheads) could be seen (x200 HPF) (D).
J Rheum Dis 2022;29:187~189
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