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Ashy dermatosis in Child
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Ashy dermatosis in Child

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Contributors: Jeffrey M. Cohen MD, Susan Burgin MD
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Synopsis

Erythema dyschromicum perstans (EDP), also referred to as ashy dermatosis, is an acquired hypermelanosis of unknown etiology. It was originally described in Latin American individuals in 1957. EDP is most common among individuals with skin phototypes III-IV. A 2006 study suggests a cell-mediated immune reaction to antigens located in basal and mid-epidermal keratinocytes.

EDP presents as asymptomatic or mildly pruritic gray-blue or gray-brown macules of various sizes on the neck, trunk, and proximal extremities. Lesions are generally distributed symmetrically and there can occasionally be an erythematous or raised border. EDP is slowly progressive. The condition does not typically regress in adults, but may spontaneously resolve in children.

EDP has been associated with certain exposures, including ammonium nitrate, oral radiographic contrast media, cobalt, and parasitic whipworm infection.

EDP occurs with equal frequency in men and women and most commonly occurs when patients are young adults.

Codes

ICD10CM:
L81.4 – Other melanin hyperpigmentation

SNOMEDCT:
58942006 – Erythema dyschromicum perstans

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Last Reviewed: 09/15/2017
Last Updated: 06/10/2019
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Ashy dermatosis in Child
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Ashy dermatosis : Neck, Primarily truncal, Trunk, Hyperpigmented macules, Hyperpigmented patches
Clinical image of Ashy dermatosis
Violaceous and dark gray macules and patches on the forehead.
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