Clinical manifestation

Sharply circumscribed, white macules and patches, sometimes with perilesional hyperpigmentation, beginning with few lesions and expanding over time Localized variant: restricted to one area, often in segmental distribution; onset early in life, then spreading rapidly within affected area; patches persist indefinitely Generalized variant: bilaterally symmetrical, white macules and patches; sometimes involve mucous membranes, particularly the lip and genitalia; occur in areas of minor trauma (Koebner phenomenon), such as elbow, knee, dorsal aspect of hands; periorificial location of involvement; depig-mentation of body hair, including scalp, eyebrow, and pubic and axillary hair

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