What causes lateral choroid plexus cysts?

Choroid plexus cyst is a disease that is easy to occur during the development of the embryo. Many fetuses will be detected with choroid plexus cysts by ultrasound during the development process. At first, it is very small around 26 weeks and may disappear slowly with the development. But if it still does not disappear, amniocentesis can be performed first to observe the size of the cyst and carry out corresponding treatment when necessary.

Causes of Choroid Plexus Cysts

The choroid plexus is a structure rich in blood vessels. In the second trimester of pregnancy, choroid plexus cysts may be detected in some fetuses, but more than 90% of fetal choroid plexus cysts disappear after 26 weeks of pregnancy, and only a few show progressive enlargement. The cysts are often bilateral and are often located in the choroid plexus of the lateral ventricles. The fluid in the cyst is cerebrospinal fluid. A small number of fetuses with choroid plexus cysts have chromosomal abnormalities. Trisomy 18 is more common, but trisomy 21 may also cause choroid plexus cysts. In this case, further examination is recommended by chromosome and Down syndrome testing.

examine

When a choroid plexus cyst is detected, it should be combined with other clinical data to further perform amniocentesis for amniotic fluid cell culture or umbilical cord puncture for umbilical blood culture to exclude chromosomal abnormalities such as trisomy 18 and trisomy 21. Choroid plexus cysts may also occur in normal fetuses, but most of them disappear after 26 weeks. Choroid plexus cysts may also occur in normal fetuses, but most of them disappear after 26 weeks. If it does not disappear after 26 weeks and is bilateral, the baby should undergo a brain examination and a chromosome examination of the umbilical cord blood cells after birth.

diagnosis

1. Cystic dark areas are seen within the strong echo of the choroid plexus, with thin cystic walls, smooth and neat edges, and mostly round in shape. Cysts can be single or multiple.

2. Dynamically observe the size of the cyst. If the cyst is less than 1 cm or getting smaller, the possibility of chromosomal abnormality is small. At the same time, attention should be paid to checking whether there are new malformations in other parts. Sometimes after the choroid plexus cyst is detected by ultrasound, other malformations cannot be detected. However, some scholars believe that the size, number, bilaterality or unilaterality, and whether the choroid plexus cyst is progressively reduced or disappears will not change the risk of the fetus suffering from chromosomal abnormalities. When a choroid plexus cyst is detected, amniocentesis for amniotic fluid cells or umbilical cord blood culture should be performed in combination with other clinical data to rule out chromosomal abnormalities such as trisomy 18 and trisomy 21.