PMC6370148_01
A. Old healed lesions in the left dorsum foot; B. New-onset skin lesions located on the right dorsum foot.
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F1
At first, the skin lessons diagnosed as dermatitis, after treated with gentamycin and ethacridine, all those symptoms were relieved (Fig. 1A). He was hospitalized for these hard healing skin lesions (Fig. 1B).
Mild hyperplasia and hyperkeratosis of squamous epithelium, dermis with hyaline degeneration, local tiny vascular wall fibrous necrosis with focal neutrophils infiltrate, interstitial exudation of red blood cells, and pathological change conforming to vasculitis. (H&E stain).
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F2
A skin biopsy pathology showed mild hyperplasia and hyperkeratosis of squamous epithelium, dermis with hyaline degeneration, local tiny vascular wall fibrous necrosis with focal neutrophils infiltrate, interstitial exudation of red blood cells, which are conforming to vasculitis (Fig. 2).