History:

Segmental vitiligo, also known as zosteriform vitiligo, represents about 5% of cases of vitiligo. This type of vitiligo typically develops before the age of 30.  While other forms of vitiligo tend to produce symmetrical lesions, segmental vitiligo is notable for unilateral involvement. The depigmentation typically spreads over one or multiple dermatomes over 1-2 years. The trigeminal dermatomes are most commonly involved, followed by dermatomes in the thoracic, cervical, lumbar, and sacral areas. In contrast to more typical vitiligo, segmental vitiligo has an earlier onset, remains stable over time, and has no familial inheritance pattern.