فهرست نشریات علمی دسترسی آزاد ایران

Background: Tonsillar herniation is a condition that manifests as herniation of the brain parts, originating from the hindbrain and progressing through the foramen magnum into the cervical vertebral canal. Although the etiology of tonsillar herniation is unclear, it has been suggested that it may be congenital or acquired. In particular, there is speculation that primary mesodermal insufficiency may affect the size of the posterior cranial fossa. Objectives: Our main objective is to perform measurements of the cranium, cerebrum, and cerebellum in order to clarify the etiology of tonsillar herniation. Results: In individuals with tonsillar herniation, while the front-back diameter of the foramen magnum, the cerebellum height, and the sagittal diameter of the cerebellum increased, the maximum cranial height, supraocciput length, clivus length, and height of the posterior cranial fossa decreased. Also, in the case of all age groups, there was no statistically significant difference between the healthy controls and the people with tonsillar herniation in terms of tentorial slope angle. The mean herniation value was 4.85 ± 3.09 mm in those with tonsillar herniation. Conclusion: Our results concerning cranium morphometry support the theory that hypoplastic posterior cranial fossa due to mesodermal insufficiency may play a role in the etiology of tonsillar herniation.