<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Tetrasomy 9p was first described in 1973 and approximately 68 cases with a variable phenotype have been reported to date with 22 of them being detected prenatally. The objective of this study was to review prenatally-reported cases of tetrasomy 9p thus far and to identify ultrasound phenotypes that may be suggestive of this specific syndrome. A PubMed database search was done in February 2018 without any restriction of publication date orjournals, with the use of the following keywords: tetrasomy 9p, tetrasomy 9p prenatal, mosaic tetrasomy 9p, mosaic tetrasomy 9p prenatal, isochromosome 9p, duplication 9p prenatal, trisomy 9p prenatal. Reported cases were included if the clinical presentation and diagnostic approach of each case was clearly described. The most common characteristics of prenatally-detected tetrasomy 9p are intrauterine growth retardation (IUGR, 57.0%), central nervous system (CNS) abnormalities (59.0%), skeletal anomalies (29.0%), genitourinary and renal anomalies (29.0%) and cardiac defects (29.0%). The phenotypic spectrum of tetrasomy 9p is rather unspecific as these findings are commonly associated with other chromosome anomalies, as well as microdeletion/microduplication or monogenic syndromes. The combination of early fetal morphology and diagnostic genetic testing enables a definite tetrasomy 9p diagnosis and effective further pregnancy management.</p></abstract>

Tetrasomy 9p was first described in 1973 and approximately 68 cases with a variable phenotype have been reported to date with 22 of them being detected prenatally. The objective of this study was to review prenatally-reported cases of tetrasomy 9p thus far and to identify ultrasound phenotypes that may be suggestive of this specific syndrome. A PubMed database search was done in February 2018 without any restriction of publication date orjournals, with the use of the following keywords: tetrasomy 9p, tetrasomy 9p prenatal, mosaic tetrasomy 9p, mosaic tetrasomy 9p prenatal, isochromosome 9p, duplication 9p prenatal, trisomy 9p prenatal. Reported cases were included if the clinical presentation and diagnostic approach of each case was clearly described. The most common characteristics of prenatally-detected tetrasomy 9p are intrauterine growth retardation (IUGR, 57.0%), central nervous system (CNS) abnormalities (59.0%), skeletal anomalies (29.0%), genitourinary and renal anomalies (29.0%) and cardiac defects (29.0%). The phenotypic spectrum of tetrasomy 9p is rather unspecific as these findings are commonly associated with other chromosome anomalies, as well as microdeletion/microduplication or monogenic syndromes. The combination of early fetal morphology and diagnostic genetic testing enables a definite tetrasomy 9p diagnosis and effective further pregnancy management.

A systematic clinical review of prenatally diagnosed tetrasomy 9p

Balkan Journal of Medical Genetics

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{"article-title":"A systematic clinical review of prenatally diagnosed tetrasomy 9p"}

Tetrasomy 9p was first described in 1973 and approximately 68 cases with a variable phenotype have been reported to date with 22 of them being detected...

A systematic clinical review of prenatally diagnosed tetrasomy 9p

Article Category: Original Article

Published Online: Aug 28, 2019

Page range: 11 - 20

DOI: https://doi.org/10.2478/bjmg-2019-0012

Keywords
Array comparative genomic hybridization (aCGH), Chromosome anomalies, Molecular karyotyping, Prenatal genetic diagnostics, Tetrasomy 9p

© 2019 Vinkšel Μ, Volk Μ, Peterlin Β, Lovrecic L, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

A systematic clinical review of prenatally diagnosed tetrasomy 9p

Article Category: Original Article

Published Online: Aug 28, 2019

Page range: 11 - 20

DOI: https://doi.org/10.2478/bjmg-2019-0012

KeywordsArray comparative genomic hybridization (aCGH), Chromosome anomalies, Molecular karyotyping, Prenatal genetic diagnostics, Tetrasomy 9p

© 2019 Vinkšel Μ, Volk Μ, Peterlin Β, Lovrecic L, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Array comparative genomic hybridization (aCGH), Chromosome anomalies, Molecular karyotyping, Prenatal genetic diagnostics, Tetrasomy 9p