Abstract:
:Despite a wide range of clinical tools, the etiology of mental retardation and multiple congenital malformations remains unknown for many patients. Array-based comparative genomic hybridization (aCGH) has proven to be a valuable tool in these cases, as its pangenomic coverage allows the identification of chromosomal aberrations that are undetectable by other genetic methods targeting specific genomic regions. Therefore, aCGH is increasingly used in clinical genetics, both in the postnatal and the prenatal settings. While the diagnostic yield in the postnatal population has been established at 10-12%, studies investigating fetuses have reported variable results. We used whole-genome aCGH to investigate fetuses presenting at least one major malformation detected on ultrasound, but for whom standard genetic analyses (including karyotype) failed to provide a diagnosis. We identified a clinically significant chromosomal aberration in 8.2% of tested fetuses (4/49), and a result of unclear clinical significance in 12.2% of tested fetuses (6/49). Our results document the value of whole-genome aCGH as a prenatal diagnostic tool and highlight the interpretation difficulties associated with copy number variations of unclear significance.
journal_name
Clin Genetjournal_title
Clinical geneticsauthors
D'Amours G,Kibar Z,Mathonnet G,Fetni R,Tihy F,Désilets V,Nizard S,Michaud JL,Lemyre Edoi
10.1111/j.1399-0004.2011.01687.xsubject
Has Abstractpub_date
2012-02-01 00:00:00pages
128-41issue
2eissn
0009-9163issn
1399-0004journal_volume
81pub_type
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journal_title:Clinical genetics
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更新日期:2017-08-01 00:00:00