A
My son was diagnosed with one in utero at 12wks.We were told that a great number of the population have these and never know unless it gets so large it causes problems or they have died and had an autopsy done.The one thing that was stressed to us was that 85-90 of babies that are followed after birth that were diagnosed with this type of cyst are hyperactive.By the way the cyst in my son's brain grew quite large then started to disappear,it was gone by 34wks.And he was diagnosed with Hyperactivity at 4 yrs old LOL!He's doing fine. I hope everything goes well,take care my prayers are with you.Amy