Ann Dermatol.  2013 Aug;25(3):360-364. 10.5021/ad.2013.25.3.360.

Generalized Dowling-Degos Disease: Case Reports

Affiliations
  • 1Division of Dermatology, Department of Medicine, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hosptial, Thai Red Cross Society, Bangkok, Thailand. jademdcu@yahoo.com

Abstract

Dowling-Degos disease (DDD) is a rare autosomal dominant trait characterized by numerous, symmetrical, progressive and pigmented macules over the axillae, groins, face, neck, arms and trunk as well as scattered comedo-like lesions (dark dot, follicles) and pitted acneiform scars. Histopathology is diagnostic testing using a distinctive form of acanthosis, characterized by an irregular elongation of thin branching rete ridges, with a concentration of melanin at the tips. We report cases of generalized DDD in a single family with autosomal dominant penetrance. DDD can be presented in a generalized form with hypopigmented lesions instead of reticulate hyperpigmentation confined to the flexor areas. This form can be differentiated from DUH by histopathology.

Keyword

Dowling-Degos disease; Pigmentary disorder; Reticulate
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