PMC9840400_01
Clinical presentation. Multiple infiltrative red patches and plaques on the face (A and B), abdomen (C) and back (D) with outwardly expanding edges in a circular pattern and tiny pustules distributed in a collar pattern.
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A 48-year-old Chinese man presented to the dermatology department with erythema and pustules on the face, neck and trunk (Figure 1A and B). A similar rash developed and spread to the abdomen and back, accompanied by pronounced itching (Figure 1C and D).
Histopathological findings. (A and B) the epidermis was normal and the dermal follicular sebaceous gland unit was infiltrated by a large number of neutrophils and eosinophils (black arrows), forming eosinophilic microabscesses.
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Skin biopsy results revealed that the epidermis was normal and the dermal follicular sebaceous gland unit was infiltrated by a large number of neutrophils and eosinophils, forming eosinophilic microabscesses (Figure 2A and B).
Resolution of lesions. The lesions on the face (A and B), abdomen (C) and back (D) subsided, leaving behind pigmentation.
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After 2 weeks of treatment, the lesions subsided, leaving behind pigmentation (Figure 3A-D).