This study is composed of three parts, the first part is clinical statistics about nevus of Ota, the second part is about pathology and ultra structures of nevus of Ota, the third is about of etiology of nevus of Ota.

• 本研究分为三部分，第一部分是对太田痣的临床资料总结，第二部分为太田痣患者的组织病理和超微结构研究，第三部分为太田痣的病因学探讨。