This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
which ultrasound finding has highest association with aneuploidy 
Select and explain. 
A. Choroid plexus cyst, B. Nuchal translucency, C. Cystic hygroma, D. Single umbilical artery
C: Cystic hygroma
Answer: C: Cystic hygroma 
Explanation: All the above mentioned are ultrasound findings associated with increased risk of aneuploidy although the highest association is seen with cystic hygroma
Nuchal translucency and cystic hygroma are both measured in first trimester
Trisomy 21 is the most common aneuploidy associated with increased NT and cystic hygroma While monosomy X presents as second trimester hygroma.