Oh Willow. Telling you not to worry really isn't going to help is it. But I agree with Lulu that if you googled any symptom you would come up with thousands of things that "could" be wrong with any child.

How about a happy story instead.

My little sis had a rapidly expanding head circumference. In her first few months of life she had x-rays, lumbar punctures (imagine doing that to a 3 week old bub), ultrasounds and any number of tests. Everything came back clear but it didn't stop my Mum having a complete breakdown thinking there was something terribly terribly wrong with her.

Turns out that she just had a rapidly expanding head circumference and it just took a while for her body to catch up. Now she is a wonderful intelligent articulate young woman (although please don't read my boo hoo thread from a few weeks ago about how irrisponsible she is - ) with no ill effects at all.

I say if the tests that have come back are all clear and if it weren't for this one measurement he would be a happy little boy then just take it as something you have to watch. And if it is an indicator of something at least you will be on the lookout for other signs and will be able to recognise them early.

If your paed was happy and you were happy until you read this article then I would just let it slide and not stress too much about it. But by all means if you are still worried then call your paed and ask them.