Table 6. Composition and distribution of ultrasound soft markers in abnormal chromosomal karyotypes.
| Ultrasound soft markers | n | Composition ratio (%) |
|---|---|---|
| T21 (n=18) | ||
| NT thickening | 3 | 16.67% (3/18) |
| Bright spots in the ventricles | 5 | 27.78% (5/18) |
| Renal pelvis dilation | 1 | 5.56% (1/18) |
| Nasal bone hypoplasia or absence | 5 | 27.78% (5/18) |
| Short humerus or femur | 2 | 11.11% (2/18) |
| Without any ultrasound soft marker | 9 | 50% (9/18) |
| T18 (n=2) | ||
| Choroid plexus cysts in the lateral ventricles | 2 | 100% (2/2) |
| Sex chromosome abnormalities (n=15) | ||
| NT thickening | 1 | 6.67% (1/15) |
| Bright spots in the ventricles | 2 | 13.33% (2/15) |
| Short femur | 1 | 6.67% (1/15) |
| Without any ultrasound soft marker | 11 | 73.33% (11/15) |
NT, nuchal translucency thickness.