The surgeon who rebuilds children's skulls
13 February 2017 Last updated at 12:02 GMT
Brianne Carter has cranio-fronto-nasal dysplasia, which means her skull is deformed.
The condition could have led to blindness, learning disabilities and severe seizures.
But thanks to surgeon David Johnson and his team at the Oxford Children's Hospital, the little girl - thought to be the only person in the UK with her conditions - will be able to develop normally.