Abstract
Purpose
Wolf–Hirschhorn syndrome (WHS) is a contiguous gene syndrome due to terminal chromosome 4p deletions. We explored prenatal diagnosis of WHS by ultrasound as well as karyotype and single nucleotide polymorphism array (SNP array) to characterize the structural variants of WHS prenatally.
Methods
Ten prenatal cases of WHS were evaluated for the indication of the invasive testing, the ultrasound features, and cytogenetic and microarray results.
Results
Eight cases were diagnosed by karyotyping and SNP array, while two cases were detected only by SNP array. Combining our cases with 37 prenatal cases from the literature, the most common sonographic features were IUGR (97.7%) and typical facial appearance (82.9%). Other less common phenotypes included renal hypoplasia (36.2%), cardiac malformation (29.8%), cleft lip and palate (25.5%), cerebral abnormalities (25.5%), skeletal anomalies (21.3%), and increased nuchal translucency/nuchal fold thickness (NT/NF) (19%).
Conclusions
The most common intrauterine phenotypes of WHS were severe IUGR and typical facial appearance with other less consistent ultrasound findings. Noninvasive prenatal testing (NIPT) is one very promising screening tool for WHS. SNP array can improve diagnostic precision for detecting WHS, especially for the cryptic aberrations that cannot be identified by the traditional karyotyping. Ectopic kidney may be a previously unrecognized phenotype of WHS.
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Acknowledgements
This work was supported by the Fund of Shanghai Municipal Science and Technology Commission (Grant Number 16411963100); Hospital development center (Grant Number SHDC 12016117); Shanghai municipal commission of health and family planning (Grant Number 201540195); Shanghai municipal medical and health discipline construction projects (Grant Number 2017ZZ02015). JLH receives funding from the Robbins Foundation.
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LMS: study/protocol planning and oversight; manuscript editing. YX: study/protocol planning and manuscript writing. YL, MZY and QS: ultrasound data collection. YJY: clinical data collection. JLH and SWC: manuscript editing. XXQ, LBD and JZ: SNP array data analysis. MG: karyotyping analysis.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Xing, Y., Holder, J.L., Liu, Y. et al. Prenatal diagnosis of Wolf–Hirschhorn syndrome: from ultrasound findings, diagnostic technology to genetic counseling. Arch Gynecol Obstet 298, 289–295 (2018). https://doi.org/10.1007/s00404-018-4798-1
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DOI: https://doi.org/10.1007/s00404-018-4798-1