If you are concerned...and you have every right to be I would get an amnio done just to check for chromosome abnormalities. I just lost a baby because it had cystic hygroma which is a build up of fluid, which they refer to as a cyst. I know how concern I was when I found out something wasn't right, easy your mind and get the test.

I am in a similar situation.... I am 18 weeks pregnant with a girl and they also found a cyst on her brain, I was examined by 2 different doctors that day and 2 ultrasound techs. The doctor said I have nothing to worry about and that it would go away. But she also told me that if I was 10 years older ( in my 30's) that it would be an issue because the baby would have downs syndrome. I am worried. I agree that you should get an amniocentesis done. It can hurt your situation

the SAME thing happende dto my boyfreinds aunt a few weeks back
shes haveing her 4th baby and they found a cyst and said not to worry and that its common.
well
it did go away
they said they cant explain why this happens
i hope everything is ok and im sure it is

I just had my 20 week level 2 ultrasound and they just found a unilateral plexus cyst close to the brain. I am having mixed feelings. Our first baby boy was born with a cleft lip and feel I have a strong risk. However my alpha protein test, even though it is not 100% indicative of trisomy 18, showed that I was negative for Down syndrome and Trisomy 18. It kind of makes me feel like I shouldnt have to worry to do an amnio. Why put another risk on to another risk. I do however feel when researching the internet that i can not rule out autism since I have boy cousins with autism. Definately there was no cleft lip shown in this level 2 ultasound which was a relief. Anyone with this same situation?

Hi clt1975 -- how did things work out for u? My ultrasound we found 2 cysts and in the alpha protein test everything was negative. We decided against the amnio cause we were comfortable with the results.