Methods: 238 Cases nevus of Ota were treated by O-switched Alexandrite, among which 3 cases taken in biopsies 8 times for light microscopic examination and the results observed.

• 方法:应用调Q开关紫翠宝石激光治疗太田痣238例。 其中3例共取8次组织病理活检,观察其结果。