Bilateral Choroid Plexus Cysts Causes

Causes of choroid plexus cysts for reasons that aren t fully understood a choroid plexus cyst can form when fluid becomes trapped within the layers of cells of the choroid plexus. It is present in less than 1 in 3 000 newborns. Chromosomes are where most of our genetic information is kept.

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The exact cause of choroid plexus cyst is unknown.

Bilateral choroid plexus cysts causes. This is caused by a blockage of foramina within the ventricular drainage system of the central nervous system cns which can lead to expansion of the ventricles compressing the brain the cranial cavity cannot expand to accommodate the increase in fluid volume and possibly causing damage. Cpcs are a rare cause of intermittent hydrocephalus. What causes choroid plexus cyst. More than 90 resolve by 26 weeks.

A choroid plexus cyst does not cause learning problems or mental retardation and are not cancer. Single or multiple cystic areas 2 mm in diameter in one or both choroid plexuses of the lateral cerebral ventricles. Associated with increased risk for trisomy 18 and possibly trisomy 21. However in some cases it may be associated with a chromosomal problem such as trisomy 18.

Fetuses with trisomy 18 have choroid plexus cysts about a third of the time. There can be one. However because many fetuses with chromosomal aneuploidy primarily trisomy 18 or edward syndrome but also trisomy 21 or down syndrome have been found to have choroid plexus cysts this ultrasound finding indicates an increase in the risk that one of these chromosome abnormalities is present in the fetus. Antenatal choroid plexus cysts are benign and are often transient typically resulting in utero from an infolding of the neuroepithelium.

Cysts can be found on one side or on both sides and they come in many different sizes. Therefore when we see choroid plexus cysts we are concerned that the fetus may have trisomy 18. It can also indicate other genetic problems. A choroid plexus cyst usually is not a cause of concern and it regresses spontaneously during the last months of pregnancy.

Choroid plexus cysts are relatively common in normal fetuses. They should not be confused with adult choroid plexus cysts which are very commonly found at autopsy and likely degenerative large intraventricular simple cysts some of which arise from the choroid plexus or choroid plexus xanthogranulomas 14. Choroid plexus cyst antenatal andrew murphy and dr yuranga weerakkody et al. Once in a while a cyst forms inside the choroid plexus and is called a choroid plexus cyst or a cp cyst.

It is a collection of fluid like a blister and not an abnormality of the brain matter itself. Trisomy 18 is rare. 1 in 50 fetuses at 20 weeks gestation. How are chromosomes relevant to the presence of choroid plexus cyst.