Craniosynostosis and hypophosphatasia.

Hypophosphatasia (HPP) when diagnosed at a young age may induce premature fusion of one or several cranial sutures, resulting in a craniocerebral disproportion. The main forms of craniosynostosis associated with HPP are loss of the sagittal suture (scaphocephaly), alone or associated with loss of the coronal sutures (oxycephaly) or associated with loss of the coronal and lambdoid sutures (pansynostosis). Craniosynostosis is accompanied by putatively functional consequences. Diagnosis must thus be early and lead to management by a specialized team.