Figure 2: (a) Clinical appearance of an erythematous plaque with crusts and ulcers. (b) Clinical image of the erythematous plaque at higher magnification. (c) Clinical image of erythema on the left dorsal hand. (d and e) Histopathological images of the erythematous plaque on the left dorsal hand (H and E, original magnification [d] ×40, [e] ×200). The dense infiltration of inflammatory cells was observed throughout the dermis. (f) Dense infiltrates with a predominance of neutrophils were detected at a higher magnification (H and E, ×400).