I-45: Choroid Plexus Cyst

CPCs are a relatively common finding during the second trimester sonography. when a choroid plexus cyst is identified, the presence of structural malformation and other sonographic markers of aneuploidy should be assessed with a detailed fetal anatomic survey performed by an experienced person. if no other sonographic abnormalities are present, the CPC is considered isolated. given the considerable improvements in imaging technology and aneuploidy screening in recent years, the risk of aneuploidy especialy the trisomy 18 in the setting of isolated CPCs is now believed to be very low.