摘要目的:对1例2q37微缺失综合征患儿进行诊断和精细定位。方法:对患儿进行染色体G显带、多重连接探针扩增(multiplex ligation-dependent probe amplification，MLPA)、单核苷酸多态性微阵列(single nucleotide polymorphism array，SNP-array)以及荧光原位杂交(fluorescence in situ hybridization，FISH)等检测。 结果:患儿染色体核型为46，XY，？del(2)，亚端粒区MLPA检测提示患儿2q37.3区 CAPN10-3、ATG4B-7基因拷贝数减少，其父母染色体核型及MLPA检测均未见异常。SNP-array显示患儿2q37.1-37.3(233 331 507-243 029 573)区存在9.7 Mb的杂合缺失。FISH分析提示患儿为46，XY，ish del(2)(q37.3)(D2S447-)，即2q37末端缺失。 结论:联合应用MLPA、FISH和SNP-array等技术可从基因组水平对患儿作出精确的诊断，并为其遗传咨询提供依据。

abstractsObjective:To diagnose and fine map a deletion in chromosome region 2q37.Methods:G-banded chromosomal karyotyping, multiplex ligation-dependent probe amplification (MLPA), single nucleotide polymorphism array (SNP-array), and fluorescence in situ hybridization (FISH) were carried out in conjunct for the analysis. Results:The patient was found to have karyotype of 46, XY, del(2)(q3? ), MLPA revealed one copy number of both CAPN10-3 and ATG4B-7 genes from the 2q37.3 region, Both parents were found to be normal upon chromosome karyotyping and MLPA. SNP-array has found a 9.7 Mb deletion in the 2q37.1-37.3 region. FISH analysis has confirmed there is a single copy for 2q37.3. Conclusion:Combination of MLPA, FISH and SNP-array have enabled accurate diagnosis for the patient, and also provided more clues for the correlation of genotype with the phenotype of the disease, and a basis for genetic counseling.