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老年斑是怎么形成的
更新时间: 2021-12-23 10:14:01  

老年斑是由淀粉样蛋白前体水解断裂的片段聚合而成。老年斑是老年人的一种皮肤退行性变。表现为散在的色素斑片,大小不等,扁平或稍高于皮面,表面光滑,呈棕褐色。多见于暴露部位,如面部、额部、手背等。

关键词: 老年斑 怎么 形成

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