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患者女,24岁.双小腿色素沉着线6个月.皮肤科情况:右小腿内侧散在分布数条纵向浅褐色色素沉着线,左小腿外侧一条纵向浅褐色色素沉着线,界清.诊断:色素性分界线.“,”A 24-year-old male presented with double leg pigmentation line 6 months.Skin examination showed:the right side of the lower leg scattered in the distribution of a number of longitudinal light brown pigmentation,the left leg of a longitudinal light brown pigmentation of the line,the boundary is clear.Diagnosis:pigmentary demarcation lines.