Idiopathic guttate hypomelanosis (IGH) is a common acquired condition, characterized by scattered 3- to 5-mm hypopigmented macules occurring on chronically sun-exposed skin. IGH typically occurs in middle-aged individuals with photodamage and increases in incidence with age and continued sun exposure.
While the exact cause is unknown, IGH has been hypothesized to be ultraviolet (UV) induced. Other contributing factors that have been suggested include aging, trauma, genetic factors, and autoimmunity.
While IGH occurs more commonly in lighter skin phototypes, it does occur in all skin colors, and it appears more prominent in individuals with darker skin.
Idiopathic guttate hypomelanosis
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Synopsis
Codes
ICD10CM:
L81.9 – Disorder of pigmentation, unspecified
SNOMEDCT:
1717003 – Idiopathic guttate hypomelanosis
L81.9 – Disorder of pigmentation, unspecified
SNOMEDCT:
1717003 – Idiopathic guttate hypomelanosis
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Last Reviewed:03/18/2020
Last Updated:03/22/2021
Last Updated:03/22/2021
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Idiopathic guttate hypomelanosis