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Prenatal diagnosis of trisomy 9

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Singapore Med J 2011; 52(7): e150-e152
Prenatal diagnosis of trisomy 9

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Zuzarte R, Tan JV, Wee HY, Yeo GS
Correspondence: Dr Regina Zuzarte, drrzuzarte@gmail.com

ABSTRACT
We present a foetus affected by trisomy 9, a rare chromosomal disorder, which was diagnosed in a low-risk patient during the first trimester of pregnancy. The finding of multiple structural foetal anomalies at the first trimester screening prompted chorionic villus sampling. Evaluation of quantitative fluorescent polymerase chain reaction was normal, but the final karyotype result revealed a diagnosis of trisomy 9. First trimester screening for the detection of foetal anomalies is highly effective. Although rapid molecular methods are available for prenatal diagnosis of common autosomal and sex chromosome aneuploidies, it is essential obtain a full karyotype in order to exclude the less commonly encountered chromosomal abnormalities.

Keywords: first trimester screening, prenatal diagnosis
Singapore Med J 2011; 52(7): e150-e152

http://smj.org.sg/sites/default/files/5207/5207cr4.pdf
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