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Nasal bone evaluation in fetuses with Down syndrome during the second and third trimesters of pregnancy

Lee, Wesley, DeVore, Greggory R., Comstock, Christine H., Kalache, Karim D., McNie, Beverley, Chaiworapongsa, Tinnakorn, Conoscenti, Giancarlo, Treadwell, Marjorie C., Johnson, Anthony, Huang, Raywin and Romero, Roberto (2003) Nasal bone evaluation in fetuses with Down syndrome during the second and third trimesters of pregnancy Journal of Ultrasound in Medicine, 22, (1), pp. 55-60.

Record type: Article


Objective: this study examined the use of three-dimensional ultrasonography for evaluating the fetal nasal bone, as a sonographic marker of Down syndrome, during the second and early third trimesters of pregnancy.
Methods: forty fetuses, including 20 with trisomy 21, were scanned once by three-dimensional ultrasonography. A midline sagittal view of the facial profile was used to analyze the volume data. Independent examiners reviewed blinded and randomly allocated volume data sets for the nasal bone. Interobserver reliability was evaluated for the sonographic presence or absence of the nasal bone. Logistic regression determined the contribution of this parameter to the presence of Down syndrome.
Results: both examiners showed substantial agreement in scoring whether the nasal bone was visualized by three-dimensional ultrasonography (P < .001). They identified 40% to 45% of fetuses with abnormalities using the absence of the nasal bone as a sonographic marker. However, a substantial number of fetuses with abnormalities were also found to have a nasal bone present. The nasal bone was visualized in 80% to 90% of fetuses without abnormalities.
Conclusions: three-dimensional ultrasonography can be used to evaluate the fetal nasal bone with substantial interobserver agreement during the second and early third trimesters of pregnancy. A nonvisualized nasal bone identified 40% to 45% of fetuses with Down syndrome in this study

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Published date: 2003
Keywords: fetus, nasal bone, prenatal diagnosis, three-dimensional ultrasonography, trisomy 21


Local EPrints ID: 25753
ISSN: 0278-4297
PURE UUID: dcc5bf18-b2f9-40b2-ab9a-53b3018c5ffc

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Date deposited: 10 Apr 2006
Last modified: 17 Jul 2017 16:09

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Author: Wesley Lee
Author: Greggory R. DeVore
Author: Christine H. Comstock
Author: Karim D. Kalache
Author: Beverley McNie
Author: Tinnakorn Chaiworapongsa
Author: Giancarlo Conoscenti
Author: Marjorie C. Treadwell
Author: Anthony Johnson
Author: Raywin Huang
Author: Roberto Romero

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