Ultrasound Misdiagnosis of Down Syndrome Nuchal Fold Thickness
These two exhibits display nuchal scan ultrasounds of the fetal head. A nuchal scan is executed by performing an ultrasound and measuring the thickness of the nuchal fold to determine the risk of fetal chromosomal abnormalities. A high thickness nuchal fold measurement can be indicative of an increased risk of Down Syndrome. The first exhibit depicts an ultrasound with colorizations to highlight the thicknesses and locations of the skull (yellow) and nuchal fold (green). The second exhibit portrays an ultrasound with the thickness of the cisterna magna labeled at 3.0 mm and the nuchal fold at 6.6 mm (indicating a risk for Down Syndrome).