目的　分析发育迟缓患儿基因拷贝数变异(CNVs)与临床表现的相关性。方法　应用微阵列单核苷酸多态性(SNP array)分析技术对1例发育迟缓患儿及其临床表型正常的父母亲进行全基因组CNVs分析。结果　在患儿chr8p23.3p23.1区域发现7.9 Mb片段缺失，在chr8p23.1p11.23区域发现27.4 Mb片段重复；在患儿父亲chr7q31.1区域发现1.21 Mb重复，chrXp22.33区域发现99 kb缺失；患儿母亲未检测到CNVs改变。结论　SNP array技术有助于进一步明确发育迟缓患儿的遗传机制。

Objective　To investigate the copy number variants of a developmental delay patient by applying single nucleotide polymorphisms array technique and to analyze the relationship between the clinical manifestation and copy number variants. Methods　Single nucleotide polymorphisms array was used to detect genomic copy number variants in a child with development delay and her phenotypic normal parents. Results　The patient had a 7. 9-Mb deletion at 8p23.3-p23.1 and a 27.4-Mb duplication at 8p23.1-p11.23, which were confirmed as pathogenic copy number variants after comparative analysis with database. Conclusions　Single nucleotide polymorphisms array could serve as a useful method to diagnose developmental delay patients and analyze pathogenesis.