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[Prenatal diagnosis and genetic analysis of two fetuses with Wolf-Hirschhorn syndrome]. | LitMetric

[Prenatal diagnosis and genetic analysis of two fetuses with Wolf-Hirschhorn syndrome].

Zhonghua Yi Xue Yi Chuan Xue Za Zhi

Center for Molecular Diagnostics, Qingyuan Hospital Affiliated to Guangzhou Medical University, Qingyuan People's Hospital, Qingyuan, Guangdong 511518, China.

Published: October 2024

AI Article Synopsis

Article Abstract

Objetive: To explore the prenatal ultrasound phenotype and genetic basis of two fetuses with Wolf-Hirschhorn syndrome (WHS).

Methods: A retrospective analysis was conducted on the ultrasound imaging data of two fetuses suspected for WHS at the Prenatal Diagnostic Center of Qingyuan People's Hospital in July 2017 and August 2019, respectively. Amniotic fluid samples of the two fetuses were subjected to chromosomal karyotyping and chromosomal microarray analysis (CMA). This study was approved by the Qingyuan People's Hospital (Ethics No. IRB-2022-064).

Results: Prenatal ultrasound examination of the two fetuses had consistently revealed WHS-associated traits including intrauterine growth restriction (IUGR), craniofacial abnormalities and cardiovascular anomalies. Karyotyping analysis suggested that both fetuses had harbored cryptic chromosomal translocations involving partial deletion of 4p. And parental verification revealed that it was de novo for fetus 1 and paternal for fetus 2. CMA has confirmed that fetus 1 had an approximately 8.7 Mb deletion at 4p16.3p16.1 and a 6.8 Mb duplication at 8p23.1p23.1, whilst fetus 2 had a 20.05 Mb deletion at 4p16.3p15.31 and a 7.66 Mb duplication at 9p24.3p24.1. The karyotype of fetus 1 was determined as 46,XN,der(4)t(4;8)(p16.1;p23.1)dn.arr[hg19]4p16.3p16.1(68345_8721580)×1, 8p23.3p23.1(158048_6933745)×3, and that of fetus 2 was determined as 46,XN,der(4)t(4;9)(p15.3;p24)pat.arr[hg19]4p16.3p15.31(68345_20116061)×1, 9p24.3p24.1(208454_7868292)×3.

Conclusion: The 4p deletion is probably the main cause for the WHS phenotype in both fetuses. WHS should be suspected when IUGR, renal anomalies, craniofacial and cardiovascular abnormalities are detected upon prenatal ultrasound screening.

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Source
http://dx.doi.org/10.3760/cma.j.cn511374-20240306-00149DOI Listing

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