检验医学 ›› 2021, Vol. 36 ›› Issue (8): 785-789.DOI: 10.3969/j.issn.1673-8640.2021.08.001

• •    下一篇

胎儿游离DNA无创产前检测次要结果在筛查Klinefelter综合征中的价值

陈丽媛, 徐咏, 王辉, 徐晓昕, 谢建生()   

  1. 南方医科大学附属深圳妇幼保健院医学遗传中心,广东 深圳 518000
  • 收稿日期:2020-04-18 出版日期:2021-08-30 发布日期:2021-08-30
  • 通讯作者: 谢建生
  • 作者简介:谢建生,E-mail: jsxieszmch@aliyum.com
    陈丽媛,女,1985年生,硕士,主治医师,主要从事产前诊断研究。
  • 基金资助:
    深圳市科技创新委员会资助项目(JCYJ20170413092818116)

Role of secondary results from non-invasive prenatal testing using cell-free DNA for fetal Klinefelter syndrome

CHEN Liyuan, XU Yong, WANG Hui, XU Xiaoxin, XIE Jiansheng()   

  1. Center for Medical Genetics,Shenzhen Maternity and Child Healthcare Hospital,Southern Medical University,Shenzhen 518000,Guangdong,China
  • Received:2020-04-18 Online:2021-08-30 Published:2021-08-30
  • Contact: XIE Jiansheng

摘要:

目的 探讨胎儿游离DNA无创产前检测(NIPT)次要结果对Klinefelter 综合征(KS)筛查的准确性,并分析KS高风险孕妇筛查后的决策、妊娠结局,以及影响父母决策的因素。方法 选取行胎儿游离DNA NIPT的单胎妊娠孕妇50 760例,对筛查出的KS高风险孕妇采用电话随访方式获其妊娠结局及新生儿出生后3个月的健康情况。回顾性分析KS高风险孕妇的NIPT指征、介入性产前诊断方案及结果、妊娠结局及新生儿结局,以及影响父母对介入性产前诊断及KS患儿接受度(选择继续妊娠)的因素。结果 NIPT筛查KS的高风险率为0.09%(44/50 760)。有75.00%(33/44)的KS高风险孕妇选择介入性产前诊断,确诊KS 29例。NIPT筛查KS的阳性预测值为88.00%(29/33)。NIPT筛查孕周为12+0~22+6周的孕妇选择介入性产前诊断的比例(84.00%)高于筛查孕周≥23周的孕妇(28.57%)(P<0.05)。29例确诊KS的孕妇中有26例(90.00%)选择终止妊娠,3例(10.00%)继续妊娠。11例拒绝介入性产前诊断的孕妇均继续妊娠。对于KS患儿的接受度,NIPT筛查孕周≥23周的孕妇(71.43%)高于筛查孕周为12+0~<22+6周的孕妇(27.00%)(P<0.05),孕次为1次的孕妇(53.33%)高于孕次为2次(12.50%)和≥3次的孕妇(44.44%)(P<0.05),产次为0次的孕妇(52.00%)高于产次≥1次的孕妇(15.79%)(P<0.05),专科及以下学历的家庭(57.14%)高于本科及以上学历的家庭(23.00%)(P<0.05),未进行胎儿染色体核型验证的孕妇(100.00%)高于确诊胎儿染色体核型为KS的孕妇(10.34%)(P<0.05)。选择继续妊娠的11例KS高风险孕妇及3例KS确诊孕妇均活产分娩,新生儿均未行染色体核型检测。结论 NIPT筛查KS的准确性较高,可考虑将其作为筛查KS的首选方式,并纳入产前管理。

关键词: 无创产前检测, Klinefelter综合征, 产前诊断, 阳性预测值

Abstract:

Objective To investigate the accuracy of secondary results from non-invasive prenatal testing(NIPT) using cell-free DNA for fetal Klinefelter syndrome(KS),and to analyze parents' decisions in cases with high risk of KS,pregnancy outcomes and factors for parental decision-making. Methods Totally,50 760 singleton pregnant women accepted NIPT using cell-free DNA were enrolled. Pregnancy outcomes and health for the newborns at 3 months of cases with high risk of KS were followed up by telephone. NIPT indications,the results of invasive prenatal diagnosis,pregnancy and neonatal outcomes,factors for parental decisions on invasive prenatal diagnosis and KS acceptance(continue the pregnancy ) were analyzed. Results NIPT detected 0.09%(44/50 760) of high risk KS fetuses. A total of 33 of 44 cases(75.00%) received invasive prenatal diagnosis,and 29 of 33 KS fetuses were determined,giving a positive predictive value of 88.00%(29/33). Pregnant women at 12+0-22+6 gestational weeks were more likely to accept invasive prenatal diagnosis than those at ≥23 gestational weeks(84.00% and 28.57%,P<0.05). Among the 29 confirmed KS cases,26(90.00%) cases were terminated,and 3(10.00%) cases chose to continue their pregnancies,while all of the 11 cases who refused invasive prenatal diagnosis chose to continue their pregnancies. In view of acceptance of KS fetuses(continue the pregnancy),there were more women at ≥23 gestational weeks than those at 12 +0-22+6 gestational weeks(71.43% and 27.00%,P<0.05),more the first pregnancy than the second and the third pregnancy or more times(53.33%,12.50% and 44.44%,P<0.05),more primiparae than multiparae(52.00% and 15.79%,P<0.05),more with college degree or below than with university degree or above(57.14% and 23.00%,P<0.05),and more without fetal karyotype than with fetal KS karyotype(100.00% and 10.34%,P<0.05). Totally,11 high-risk KS and 3 with fetal KS karyotype cases who continued the pregnancy gave birth to alive babies,but none of the fetuses received postnatal karyotyping. Conclusions The accuracy of NIPT in screening KS is relatively high,so it might be considered as a preferred prenatal screening method for KS and is included into prenatal management.

Key words: Non-invasive prenatal testing, Klinefelter syndrome, Prenatal diagnosis, Positive predictive value

中图分类号: