A 35-year-old woman presented with recurrent, intensely pruritic erythematous plaques over both forearms for eight months, without systemic symptoms or identifiable triggers. Clinical examination showed well-defined edematous papules and plaques with a tendency for centrifugal spread and central resolution. Histopathology revealed epidermal ulceration with parakeratosis, massive dermal edema, and a dense neutrophilic infiltrate with leukocytoclasia and histiocytes in the upper and mid dermis, without evidence of vasculitis. The lesions responded well to a combination of oral and topical anti-inflammatory agents, with complete resolution within a month. This report highlights a rare, recurrent neutrophilic dermatosis presenting with annular morphology and underscores the importance of CPC.
Sadhukhan et al. (Sat,) studied this question.