I'm mildly freaking out here. My daughter had her 6 month check-up yesterday and the doctor said her head grew a lot. She wants her to get a head ultrasound to rule out Hydrocephalus (water on the brain). She has no other symptoms. At her last appt. the baby was fussy and had a small flat spot that is now much, much better so I'm hoping that she just didn't get a good measurement last time. Has anyone been through this and had it turn out to be nothing?                
                             
        
Re: Hydrocephalus?
My sons were both diagnosed with hydrocephalus in Dec 2011. They had vp shunts placed when they were still in the NICU. Usually hydrocephalus comes with other symptoms: irritability, sunsetting of the eyes (baby is constantly looking down), etc.
I think BHilyer's son was sent for a sonogram bc of rapid head growth and it turned out to be nothing. Could just be a growth spurt but your pedi is right to err on the side of caution. When is your appt for the sono?
Edit: Grammar & clarification
Between 4 and 6 months the nugget's head circ. went from the 15% to the 30th while her weight and length did not have a significant change in percentile. We had a head u/s and everything turned out ok. the u/s itself wasn't a big issue because her fontanelle hadn't closed, so it was easy and painless. The anticipation was the worst though. She didn't have any other symptoms other then the big dome. She still has a large head - at her one year it was in the 40th percentile i think while her weight and height are still not on the chart.
Hang in there - its definitely stressful. Good luck with your appts. this week!