Craniosynostosis can usually be diagnosed by a paediatrician (specialist in treating children) after a visual examination of your baby's head.
Any severe distortions of the skull or face will be apparent, and the existence of ridges over fused sutures or misalignment of the ears also provide evidence of craniosynostosis.
An X-ray or CT scan of the skull may be taken to confirm a diagnosis. CT scans are usually only required to plan some types of surgery or if the diagnosis is in doubt.
If your child has other birth defects that suggest craniosynostosis may be part of a wider syndrome, a sample of their blood, hair or saliva may be taken and tested for any genetic mutations.