Question

Which of the following ultrasound findings would indicate the possibility of triploidy?

1) Presence of a large placenta
2) Presence of cystic hygroma
3) Presence of club feet
4) Presence of spina bifida

Answer 1

The presence of a large placenta on an ultrasound can indicate the possibility of triploidy, a chromosomal abnormality with an extra set of chromosomes in a fetus.

Step-by-step explanation:

Among the ultrasound findings listed, the presence of a large placenta would indicate the possibility of triploidy. Triploidy is a chromosomal abnormality where a fetus has an extra set of chromosomes, for a total of 69 chromosomes instead of the usual 46. This condition often results in distinctive ultrasound findings during pregnancy. A large or thickened placenta, sometimes referred to as a 'molar' placenta, can be a manifestation of triploidy. While cystic hygroma, club feet, and spina bifida are also findings that can be associated with various genetic abnormalities, they are not as specifically indicative of triploidy as a large placenta is.