Important first trimester US findings Flashcards
1
Q
What is the definition of a thick NT?
A
NT > 3 mm
2
Q
What is the down syndrome associated with a thickened NT?
A
1:6, 16%
3
Q
What other conditions are associated with thickened NT?
A
Noonan syndrome, skeletal dysplasia
4
Q
If the NT is greater than ____, there is a 25% risk of cardiac defects
A
3.5mm
5
Q
True or false: Cystic Hygromas are always pathologic
A
False
6
Q
Cystic Hygromas are abnormal what percent of the time?
A
75%
7
Q
Cystic Hygromas are associated with what type of anomalies
A
Karyotype abnormalities
