Case of sequentially occurring lesions of facial lichen sclerosus following the lines of Blaschko.

Extragenital lichen sclerosus (LS) is usually asymptomatic and appears as ivory- or porcelain-white macules, papules and plaques. It is most common on the neck, shoulders and upper portion of the trunk. To date, the linear form of extragenital LS corresponding to the lines of Blaschko on the trunk or limbs has been rarely reported. We describe a 25-year-old Korean woman with sequentially occurring lesions of extragenital LS confined to the face following the lines of Blaschko.