Which genetic syndromes are associated with cystic hygromas?

• A. Klinefelter's syndrome
• B. Turner’s syndrome
• C. Down’s syndrome
• D. All of the above

Answer: (D)

Cystic hygromas are often identified as fluid-filled sacs that result from malformations in lymphatic drainage and are commonly associated with several genetic syndromes.

Turner’s syndrome is characterized by the absence or structural abnormalities of one of the X chromosomes. Cystic hygromas are frequently observed in fetuses with Turner syndrome, particularly in the first trimester as part of the increased risk for anomalies.

Klinefelter's syndrome, which involves the presence of an extra X chromosome in males (XXY), has been linked to cystic hygromas as well, though they are less common compared to Turner syndrome.

Down syndrome, caused by the presence of an extra copy of chromosome 21, has also been associated with an increased risk of cystic hygromas, particularly during prenatal screenings.

The association of cystic hygromas with all these syndromes supports the inclusion of all of them in the answer, as multiple genetic syndromes can lead to such lymphatic malformations. This multifactorial aspect highlights the importance of monitoring for cystic hygromas during prenatal assessments as an indicator of potential chromosomal abnormalities.