Craniosynostosis: Quantifying Differences in Skull Architecture.

Area of Science:

• Pediatric Neurosurgery
• Craniofacial Surgery
• Medical Imaging Analysis

Background:

• Craniosynostosis involves premature fusion of cranial sutures, leading to diverse skull shapes.
• Identifying indicators of increased intracranial pressure (ICP) is crucial for managing craniosynostosis phenotypes.
• Conventional 2D analysis may not fully capture complex skull morphology changes.

Purpose of the Study:

• To advance the understanding of craniosynostosis phenotypes using 3D analysis.
• To identify specific indicators of increased intracranial pressure (ICP) in midline craniosynostosis.
• To differentiate skull morphology and topography between sagittal and metopic craniosynostosis.

Main Methods:

• Retrospective review of pediatric patients with midline craniosynostosis.
• 3D segmentation of computed tomography (CT) data using 3D Slicer.
• Analysis of skull shape (flatness, surface area to volume ratio) and topography (bone thickness, surface variance, standard deviation).

Main Results:

• Sagittal craniosynostosis showed angulated frontal/occipital bones and flatter parietal bones.
• Increased parietal bone surface variance in sagittal craniosynostosis suggests gyral impressions from elevated ICP.
• Metopic craniosynostosis demonstrated flatter frontal bones with minimal impact on other skull segments.

Conclusions:

• 3D analysis reveals distinct skull morphology and topography in sagittal and metopic craniosynostosis.
• Parietal bone surface variance is a potential indicator of increased ICP in sagittal craniosynostosis.
• Metopic craniosynostosis primarily affects anterior skull growth, unlike sagittal craniosynostosis's broader ICP indicators.