depigmentation (patchy)

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Causes of patchy hypomelanosis include:

  • congenital:
    • tuberose sclerosis
    • piebaldism - partial albinism
    • naevus depigmentosus
    • Waardenburg's syndrome
  • acquired:
    • post-inflammatory:
      • scarring for example, burns, chicken pox
      • discoid lupus erythematosus
      • eczema, especially in negroes
      • pityriasis alba
    • infection:
      • leprosy
      • pityriasis versicolor
      • pinta
    • immunological:
    • vitiligo.
      • halo naevus - circulating antimelanoma antibody
    • toxins:
    • phenolic disinfectants
      • hydroquinones

Last reviewed 01/2018

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