Dowling-Degos病1例OA

We report a case of Dowling-Degos disease.A 47-year-old female presented with a 10-year history of black-brown macules and papules on the neck,inframammary region,axillae,groin,and external genitalia.Dermatological examination revealed symmetrical brown to black-brown macules,papules,and flat papules in the skinfold areas,such as the neck,under the breasts,armpits,abdomen,groin,and external genitalia,with some areas showing a confluent,reticular pattern.Histopathological examination of the skin lesions showed slight acanthosis with markedly elongated,finger-like epidermal rate ridges,hyperpigmentation of the basal layer,mod-erate lymphocytic infiltration in the superficial dermis,and melanophages.Diagnosis:Dowling-Degos disease.The patient declined treatment.