唐氏综合征
唐氏综合征（21-三体综合征，先天愚型，英文：Down syndrome或Down's syndrome），是一个因为21号染色体个三体现象造成个遗传疾病，常见症状有发育迟缓、弗同个面部特征搭子轻度到中度个智能障碍。
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