A Boy with Reticular Lesions on His Waist and Back

Abstract

Prurigo pigmentosa (PP) is an uncommon inflammatory skin disease. The mechanism of pathogenesis for PP is unknown. PP is common in Asian women of childbearing age. It has been characterized into three stages based on appearance and pathology. Early-stage lesions present as pruritic urticarial plaques or papules. Fully developed PP lesions manifest as crusted erythematous papules, papulovesicles, blisters and bullas. Late-stage lesions evolve into smoothurfaced pigmented macules. Lesions representing different stages of the disease often exist concurrently, coalescing to form a reticular pattern. However, PP, in which the lesions appear as blisters, is less common. Here we reported a case of PP characterized by many blisters, and review the literature of PP.KeywordsPrurigo pigmentosaBlistersReticular patternErythema ab igneConfluent and reticulated papillomatosisEczemaErythema dyschromicum perstantsDoxycycline