Combination therapy with prednisone and isotretinoin in early erythema dyschromicum perstans: A retrospective series

Abstract

Erythema dyschromicum perstans (EDP) is an acquired hyperpigmentation disorder characterized by asymptomatic, polycyclic, irregularly shaped light lilac-grey patches surrounded by erythematous borders in the early inflammatory stage and subsequently greyish-blue patches in the later ashy stage. Affected areas include the trunk, neck, face, and upper extremities. Mucous membranes are spared.1 EDP occurs in both children and adults, has a higher frequency noted in women, and is common among Latin American, Asian, and Indian populations.

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