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