H.W.
Yes! We went through this with our daughter who is now 7 1/2 years old & in 1st grade.
At her 6 month check-up her cranial plates had fully fused - as in had not grown AT ALL since her 4 month check-up. The condition is called Craniosynistosis (my spelling may be a bit off).
The first thing the doc told me when I asked her to write down the name of the possible condition was to NOT go on the Internet, look at all the pictures and freak out! She said that the pics would be of the worst cases...NOT what might be going on with my daughter.
We did have to send her in for a CT Scan - it was probably one of the most difficult parenting days of my life, watching my tiny little girl through the window...but trust me, it was much harder on me than on her - so I feel your fear completely!!!
We had to wait a couple of weeks to get in for the CT scan and THEN we had to wait for the pediatrician to get the results and THEN we had to wait to see the Neurosurgeon - thankfully we were living in Baltimore and were with a Johns Hopkins practice - our pediatrician had done part of her residency with Ben Carson - the neurosurgeon who separated the conjoined twins...so we KNEW we were in extremely good hands!
All of that said, we went in to see him, he looked at the CT scan, looked at our tiny little girl (she was about 7 months at this point), looked at me and said, "I think there's about a 90% chance she has a small head...you have a small head (meaning me) so it stands to reason she does too." He wanted to see us back in 6 months to make sure.
6 months later, the pediatrician told us everything was progressing well and did not see any reason to return for follow-up with Dr. Carson.
My daughter is healthy, happy, gorgeous and her head is completely normal - she is petite in general so it all fits.
During this ordeal, my husband was beside himself, feeling that the doc had driven me crazy by giving me the worst case scenario - I'm a worst case scenario kind of girl...tell me the worst thing it could be, I'll mentally prepare for that and anything other than that is better than the worst, right? He's a "deal with it when it's a reality" kind of guy.
So...from what our doc told me...the worst case scenario for our daughter was this...neurosurgery. They separate the cranial plates, place what is akin to little lego pieces in between the plates to give the head some space and allow for proper growth, close everything back up, the hair grows back and everything moves forward according to plan. Scary, yes...but for me, as terrified as I was, this simple explanation made it manageable.
Was I thankful it didn't come to that? of course! but it is apparently a lot more common than I realized - one of those things that when I was ready to curl up in a ball and sob for days, the few people I told shared stories with me about children, friends, neighbors, nieces, nephews, etc. who had gone through exactly the same thing and came out just fine.
I hope this helps. It is very very scary - the waiting is the worst - but what I did learn is that with this, the docs ALWAYS err on the side of caution and the # of cases that require any intervention beyond the CT scan is VERY VERY small! This is one of those things that the docs have to kind of be alarmists about - better safe than sorry, but it is extremely rare that it amounts to anything.
Please feel free to contact me directly if I can be of any further help. Good luck!!!