国际生殖健康/计划生育杂志 ›› 2023, Vol. 42 ›› Issue (2): 115-118.doi: 10.12280/gjszjk.20220328

• 论著 • 上一篇    下一篇

11例胎儿22q11微缺失综合征的产前诊断

李燕青, 傅婉玉, 陈耿波, 王元白, 江矞颖, 肖珊珊, 庄建龙()   

  1. 362000 泉州市妇幼保健院·儿童医院产前诊断中心
  • 收稿日期:2022-07-06 出版日期:2023-03-15 发布日期:2023-03-21
  • 通讯作者: 庄建龙 E-mail:415913261@qq.com

Prenatal Diagnosis of 22q11 Microdeletion Syndrome in 11 Fetuses

LI Yan-qing, FU Wan-yu, CHEN Geng-bo, WANG Yuan-bai, JIANG Yu-ying, XIAO Shan-shan, ZHUANG Jian-long()   

  1. Prenatal Diagnosis Center, Quanzhou Women’s and Children’s Hospital, Quanzhou 362000, Fujian Province, China
  • Received:2022-07-06 Published:2023-03-15 Online:2023-03-21
  • Contact: ZHUANG Jian-long E-mail:415913261@qq.com

摘要: 目的: 提高对胎儿22q11微缺失综合征(22q11 microdeletion syndrome,22q11DS)产前诊断的认识。方法: 回顾性分析2017年1月—2021年7月在泉州市妇幼保健院·儿童医院产前诊断中心行羊水/脐血染色体核型及单核苷酸多态性微阵列(single nucleotide polymorphism array,SNP-array)检测的病例。分析产前诊断确诊为22q11DS胎儿的超声临床特征、遗传学病因及随访结果。结果: SNP-array共检出11例22q11DS,检出率为0.37%(11/2 958)。5例行父母验证,其中1例遗传自表型正常的父亲,4例为新发突变。9例产前超声提示不同程度的超声异常,包括4例心血管系统异常,3例胎儿颈后透明层厚度增厚,1例双足内翻,1例十二指肠闭锁。另外2例产前超声未提示明显异常。确诊后6例引产,1例失访,4例选择继续妊娠,其中2例出生后随访未见明显异常,2例出生后失访。结论: 22q11DS胎儿产前主要表现为超声结构异常,对于超声异常胎儿进一步行SNP-array检测可提高染色体微缺失的检出率。

关键词: 22q11缺失综合征, 胎儿, 超声检查,产前, 遗传学技术, 多态性,单核苷酸, 微阵列分析, 产前诊断

Abstract: Objective: To improve the understanding of prenatal diagnosis of fetuses with 22q11 microdeletion syndrome (22q11DS). Methods: A retrospective analysis was conducted on the cases of amniotic fluid/umbilical cord blood chromosome karyotype and SNP-array detection in the Prenatal Diagnosis Center of Quanzhou Women’s and Children’s Hospital from January 2017 to July, 2021. The ultrasonic clinical features, genetic etiology and follow-up results of fetuses with 22q11DS were analyzed. Results: A total of 11 cases of 22q11DS were detected by SNP-array analysis, with a detection rate being 0.37%(11/2 958). Five cases performed the parental SNP-array verification, among them, 1 case inherited from the normal father and the other 4 cases were de novo. There were 9 cases with different ultrasound abnormalities including 4 cases of abnormal cardiovascular system, 3 cases of NT thickening, 1 case of bipedal varus and 1 case of duodenal atresia. The other 2 cases showed no obvious abnormality on prenatal ultrasound. Six cases were induced labor; 1 case was lost to follow-up. Four cases chose to continue pregnancy, of which 2 cases were followed up without obvious abnormality, and 2 cases were missed. Conclusions: Fetal with 22q11DS mainly manifest ultrasound structural abnormalities. Further SNP array detection of ultrasound abnormal fetus can improve the detection rate of chromosome microdeletion.

Key words: 22q11 deletion syndrome, Fetus, Ultrasonography, prenatal, Genetic techniques, Polymorphism, single nucleotide, Microarray analysis, Prenatal diagnosis