Analysis of Cranial Base Suture Fusion Patterns.

Area of Science:

• Anatomy
• Radiology
• Craniosynostosis

Background:

• Cranial vault sutures fuse in adulthood, but cranial base suture behavior is less understood.
• Clinicians interpret cranial suture behavior on CT imaging for craniosynostosis treatment.

Purpose of the Study:

• To clarify the radiographic appearance of cranial base sutures across the human lifespan.
• To provide a detailed understanding of cranial base suture fusion patterns.

Main Methods:

• Reviewed 30 CT scans per decade from age 1 to 90.
• Evaluated 10 specific cranial base sutures for fusion status (obliterated, fused, open, unvisualized).

Main Results:

• Most cranial base sutures remain visible through the 8th decade, with ossification beginning in the 2nd decade.
• Occipitomastoid sutures were >90% open in the 9th decade, while sphenosquamosal and frontozygomatic sutures were mostly fused.

Conclusions:

• Cranial base sutures exhibit radiographic behavior similar to cranial vault sutures, remaining largely visible with variable ossification.
• Certain cranial base sutures persist open throughout life, requiring further investigation into their clinical implications.