Prenatal diagnosis and genetic analysis of a 46,XN,del(11)(q14q22) fetus.
10.3760/cma.j.issn.1003-9406.2020.08.018
- VernacularTitle:一例46，XN，del（11）（q14q22）胎儿的产前诊断及遗传学分析
- Author:
Liping ZHAO
1
;
Huayu LUO
;
Guixiang LUO
;
Xianrong QIU
;
Yanjie LIAO
Author Information
1. Department of Laboratory Medicine/Institute of Medical Genetics, Zhuhai Maternal and Child Health Care Hospital, Zhuhai, Guangdong 519000, China. 1403801042@ qq.com.
- Publication Type:Journal Article
- From:
Chinese Journal of Medical Genetics
2020;37(8):879-882
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE:To diagnose a 46,XN,del(11)(q14q22) fetus by non-invasive prenatal testing (NIPT), karyotype analysis and whole genome sequencing (WGS).
METHODS:Peripheral blood sample of the gravida was taken for NIPT screening. Blood samples of the gravida, her husband, and umbilical cord blood were also taken for chromosome karyotyping and whole genome sequencing (WGS).
RESULTS:NIPT screening indicated the fetus has carried partial deletion of chromosome 11, while no chromosomal abnormality was found with the cord blood sample due to the low resolution of G-banding analysis. WGS analysis of the cord blood indicated 46,XN,del(11q14.3q22.1). seq[GRCh37/hg19] (90 623 404-97 469 319)×1, 6.85 Mb. The karyotype of the fetus was eventually determined as 46,XN,del(11)(q14q22). Karyotyping analysis suggested that the gravida and her husband were 46,XX,del(11)(q14q22)[8]/46,XX[92] and 46,XY, respectively. However, neither of them was found to harbor the del(11)(q14q22) by WGS.
CONCLUSION:The abnormal karyotype of the fetus has derived from its mother's low percentage mosaicism. Combined NIPT, karyotyping analysis and WGS can detect chromosomal disorders with accuracy.
