Parents who thought their baby was happy because they 'giggled' for up to 17 hours a day were shocked to discover they actually had a rare brain tumor.
Gemma and Ed Young noticed that their are Jack started making chuckling sounds two weeks after he was born.
When the infant continued to make the noises they eventually sought medical advice.
That's when doctors discovered that the laughing fits were triggered by a hypothalamic hamartoma, a type of brain tumor that causes epileptic seizures.
With the diagnosis in place, doctors had to wait until Jack turned two to carry out the delicate operation to remove the tumor.
You can find out what happened next in the video above.