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Nuchal translucency

Case contributed by Dr Henry Knipe


Combined first trimester screening.

Patient Data

Age: 36 years
Gender: Female

CRL is 56 mm. Nuchal translucency is 2.1 mm. 

The expected nuchal translucency (NT) is 1.54 mm (50th percentile) - the measured NT value is 84th percentile for this CRL.

Case Discussion

Increased nuchal translucency (>95th percentile) is indicative of abnormal chromosomes (e.g. aneuploidy) and in the absence of this, it is still associated with increased risk of structural abnormality (e.g. major cardiac defects).

A more accurate risk assessment can be obtained when this measurement is combined with serum markers and maternal age. 

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Case information

rID: 37883
Published: 24th Jun 2015
Last edited: 5th Jan 2020
System: Obstetrics
Tag: normal
Inclusion in quiz mode: Excluded

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