First off, thanks to everyone for this thread. My wife and I are 21 weeks into the pregnancy of our first child.
Last week we went into our 20th week office visit which we thought was simply for checking the heartbeat and finding out the gender of our baby. We had no idea that the purpose of the visit was actually to have an ultrasound and 60 pictures to check the development of the baby. Everything checked out fine - it's a boy - until the doctor met with us afterwards and near the end of the visit mentioned that there was one area of "concern". It turned out that the right lateral ventricle of our baby was borderline mild ventriculomegoly at 10mm. We were in shock and asked what this meant. The doctor simply said that this was rare and in one case in two years, it led to "hydrocephalus". That latter word was what stuck in our memory as we were sent home with a promise of a referral to a "high-risk" specialist. Don't these doctors think about the terms they use?
Naturally as soon as we got home, we Googled hydrocephalus and read devastating stories, not knowing that these were the very worst outcomes of ventriculomegaly and very rare. Backtracking for a while we found out what was really affecting our baby.
Three days later after the weekend, we didn't wait for the specialist to contact us, we contacted her office and although they were booked for the whole week, once she heard about our case, a unilateral borderline MVM, she told us to come in same day. They proceeded to use a level II ultrasound to take new scans and measured the left lateral ventricle at 4mm and the right lateral ventricle at 11mm. All soft markers came back normal/negative. No signs of blood (infection) or calcium build up. He weighed 1 lb 1 oz, or about 2.5 weeks ahead of average development.
Our maternal fetal medicine specialist happens to be the top practitioner in her field in our region of Florida for one of the largest health systems. She told us that she wasn't overly concerned at this point because this is more prevalent in boys and everything else about the baby is perfect. There are no other indicators that anything is wrong. She said there is a strong chance things would turn out fine. She said an amniocentesis would provide little of value in this case and that she wants to see us in 4 weeks to check the ventricles' status and assess where we go from there.
I work with a psychiatrist who is married to a neonatologist and he told us that we don't have much to worry about because everything else looks good and its so rare that cases like ours turn out to be chromosomal or other developmental problems later. His job is working with premies and babies born with various complexities.
Reading other accounts from people who have gone through this, I find it interesting that beyond mostly impacting boys, there is also a tendency that our babies are larger and developed further along ahead of schedule. Also it's comforting to see that most cases tend to resolve themselves either by ventricles staying the same, shrinking, or returning to normal between 24-28 weeks. I'm curious whether these particular babies who are growing quickly are simply entering a growth phase during the 20th week timeframe when measurements are first taken, perhaps when the brain is developing, and maybe this explains some of the larger ventricles? There doesn't seem to be much understanding or studies out there that explore what exact role the spinal fluid plays in the baby's brain development. Maybe wishful thinking on our part.
We did read on Kaiser Foundation's literature that of the 4 million babies born every year in the United States, 0.001% or 4,000 babies have mild ventriculomegaly in one or both lateral ventricules. 90% or 3600 babies are born normal and the ventricules stay the same size or return to normal. 400 babies have ventricules that get larger. 4% or 160 babies have chromosomal abnormalities.
Take away fact: In MOST babies with MVM the ventricules stay the same, reduce in size, or even return to normal. MOST babies with MVM and normal test results are born healthy.
We'll report back the outcome of our next visit on 9/24 and how the ventricules are measuring. Obviously we're hoping for the best for our little man.
Best of luck to all of you and thanks for all the information on this thread.
Kevin and Darlene