Unilateral linear lichen sclerosus et atrophicus.

We report on a 23-year-old woman with unilateral lichen sclerosus et atrophicus (LSA) who exhibited extensive eruptions on the right extremities and right aspect of the abdomen. The lesions on the right extremities appeared to exhibit a linear pattern along Blaschko's lines, while the right abdominal skin lesion was a whitish, parchment-like plaque. Histological findings for both lesions showed characteristic features of LSA. LSA should be differentiated from the linear type and the macular type of localized scleroderma.