Grading & Level of Importance: B
获得性局限性色素脱失。
黑素细胞合成黑素障碍。
局限性小（碎纸屑样）斑疹，可融合为大斑片，常对称分布，Wood灯下完全色素脱失。
好发于面、手、肛门外生殖器区和脐周，任何部位均可能被累及。
与特应性体质、自身免疫性甲状腺炎有关。
表皮黑素缺乏，早期可见炎性细胞浸润。
有自行消退的可能。
因为生物滤器（黑素）缺乏，日晒伤和慢性日光性损伤倾向增加。
依据临床表现诊断。
花斑癣、贫血痣、无色素痣、特应性白色糠疹和硬化性苔藓的斑疹。
紫外线治疗、外用糖皮质激素、遮盖剂、防晒霜，以及稳定期白癜风的移植治疗。
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