PMC6362479_01
Centrally ulcerated edematous nodules with violaceous borders on the dorsal aspects of right index finger and proximal metacarpophalangeal joint of mainly third finger. Note the bulbous edema of the affected digits.
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fig1
The fingers in the nonulcerated areas displayed a fusiform swelling (Figures 1 and 2).
Large ulcerated oozing plaque on the dorsum of left ring finger with purulent-appearing exudate.
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fig2
The fingers in the nonulcerated areas displayed a fusiform swelling (Figures 1 and 2).
(a,b,c,d) Marked papillary dermal edema, superficial and deep perivascular, interstitial, and diffuse infiltrate of neutrophils with leukocytoclasia, extravasation of erythrocytes, vasculopathic changes, and absence of true vasculitis (hematoxylin-eosin 4X, 10X, 20X, and 40X, respectively).
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fig3
Despite vasculopathic changes, there was no evidence of true vasculitis (Figures 3(a), 3(b), 3(c) and 3(d)).
(a,b) Healed lesions with subtle residual erythematous patches, four weeks after treatment with oral prednisone.
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fig4
After one month, there was mild residual erythema at the previous sites (Figures 4(a) and 4(b)).