Peds

Halo Nevus

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Halo Nevus, Halo Nevi

  • Pathophysiology
  1. Compound Nevus or Dermal Nevus
  2. Halo region is depigmented, without Melanocytes
  3. T-Lymphocyte mediated depigmentation
  • Epidemiology
  1. Onset in teen years
  2. Incidence: 1%
  • Signs
  1. White, symmetric round halo surrounding a nevus
  2. Distribution
    1. Trunk is most typical
    2. Always spares the palms and soles
  • Associated Conditions
  1. Vitiligo risk may be increased
  • Course
  1. Repigmentation may occur spontaneously over years
  • Prognosis
  1. Rare malignant transformation (typically predictable by atypical features)
  • Reference
  1. Habif (2003) Clinical Dermatology, 4th ed.. Mosby, p. 773-813