Postnatal Sagittal Craniosynostosis: A Novel Presentation and Considerations in Diagnosis and Management.

Sagittal craniosynostosis results in scaphocephaly from abnormal fusion of the sagittal suture. Traditionally, craniosynostosis presents at birth and is diagnosed within the first year of life. The authors report a patient with development of sagittal craniosynostosis after birth, which we term postnatal sagittal craniosynostosis. This is a rare occurrence in which management considerations are critical but are not well discussed. A 3-year-old boy presented with concerns of a metopic ridge. Workup revealed metopic ridging and an open sagittal suture. The patient later developed signs of increased intracranial pressure and repeat computed tomography scan 14 months later identified a newly fused sagittal suture. The patient underwent open posterior cranial vault expansion, resulting in resolution of symptoms. Postnatal sagittal craniosynostosis is a rare condition and should be considered in otherwise unexplained increases in increased intracranial pressure among pediatric patients. Open posterior cranial vault expansion represents a safe and effective method to treat this condition.