胎儿染色体异常与产前超声特征的相关性研究

目的探讨胎儿染色体异常与产前超声特征的关系。方法收集我院2005年1月至2009年12月经产前诊断出的53例染色体异常胎儿,与产前超声检查出的异常征象进行对比性分析,统计染色体异常胎儿的检出类型与超声畸形谱,并对染色体异常的胎儿进行术后或出生后随访。结果共有510例羊水和脐带血样本进行染色体检查,检出异常核型53例,阳性率为10.2%。其中,染色体数目异常32例,包括21-三体15例,18-三体11例,13-三体2例,45,XO单体2例,92,XXXX四倍体2例。染色体结构异常21例,包括易位4例,插入3例,倒位6例,缺失4例,衍生4例。染色体异常胎儿产前超声检查为明显结构畸形者占41.5%(22/53);结构畸形合并超声软标记者占34.0%(18/53);单独检出超声软标记者占15.1%(8/53)。结论胎儿产前超声检查异常与染色体异常关系密切。染色体异常胎儿产前超声常表现为各种明显结构畸形,畸形数越多,染色体异常的风险越大,出现超声软标记时胎儿染色体异常的风险也将增加。了解各种类型的染色体异常的超声畸形谱,对产前识别高风险胎儿,提高侵入性操作的阳性率,减少漏诊有重要意义

Correlation of fetal chromosomal abnormalities to prenatal ultrasound features

Objective To investigate the correlation between fetal chromosomal abnormalities and the characteristic features of prenatal ultrasound findings.Methods A total of 510 cases were underwent chromosome examination by amniotic fluid or cord blood analysis to identify fetal chromosomal abnormalities.The correlation between the abnormalities and the characteristics of the prenatal ultrasound findings was analyzed.Results Fifty-three cases of abnormal karyotypes were detected with a positivity rate of 10.2%.Of th...