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