A case of prurigo pigmentosa misdiagnosed as impetigo = A case of prurigo pigmentosa misdiagnosed as impetigo

다국어 초록 (Multilingual Abstract)

Prurigo pigmentosa(PP) is an uncommon inflammatory skin disease that presents as a symmetrical erythematous papules, papulovesicles or pustules on back, chest and neck, typically. The lesions resolve after several days, leaving behind pigmentation in reticulated pattern. Patients with PP can present various skin lesions along with progression of PP so that the range of differential diagnosis of PP is extensive. A 21-year-old woman complained pruritic erythematous papules with erosions and crusts on back and chest. The lesions appeared in symmetrical and reticulated pattern. She had been diagnosed as impetigo with allergic contact dermatitis, then applied topical antibiotics and betamethasone for 2weeks at local clinic. However the lesions couldn’t get any improvement. Histopathologic finding showed perivascular lymphocytic infiltrates. We could diagnose her as PP considering clinical and histopathological findings, and then treated with minocycline. The erythematous and reticulated papules improved after 3 weeks, effectively. We report this case because physicians can misdiagnose PP as other diseases including impetigo easily.