Anatomical Variant of Atlas : Arcuate Foramen, Occpitalization of Atlas, and Defect of Posterior Arch of Atlas

Journal of Korean Neurosurgical Society
Myoung Soo Kim

Abstract

We sought to examine anatomic variations of the atlas and the clinical significance of these variations. We retrospectively reviewed 1029 cervical 3-dimensional (3D) CT images. Cervical 3D CT was performed between November 2011 and August 2014. Arcuate foramina were classified as partial or complete and left and/or right. Occipitalization of the atlas was classified in accordance with criteria specified by Mudaliar et al. Posterior arch defects of the atlas were classified in accordance with criteria specified by Currarino et al. One hundred and eight vertebrae (108/1029, 10.5%) showed an arcuate foramen. Bilateral arcuate foramina were present in 41 of these vertebrae and the remaining 67 arcuate foramina were unilateral (right 31, left 36). Right-side arcuate foramina were partial on 18 sides and complete on 54 sides. Left-side arcuate foramina were partial on 24 sides and complete on 53 sides. One case of atlas assimilation was found. Twelve patients (12/1029, 1.17%) had a defect of the atlantal posterior arch. Nine of these patients (9/1029, 0.87%) had a type A posterior arch defect. We also identified one type B, one type D, and one type E defect. Preoperative diagnosis of occipitalization of the atlas and arcuate foramina...Continue Reading

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Citations

Oct 23, 2016·The Spine Journal : Official Journal of the North American Spine Society·Juan A Sanchis-GimenoEsther Blanco-Perez
Apr 14, 2017·Homo : internationale Zeitschrift für die vergleichende Forschung am Menschen·M K Karapetian
Feb 7, 2018·Journal of Craniovertebral Junction and Spine·Ivan LvovVladimir Krylov
Aug 1, 2019·Ecology Letters·Tora Finderup NielsenHans Henrik Bruun
Jan 7, 2020·Child's Nervous System : ChNS : Official Journal of the International Society for Pediatric Neurosurgery·Arnold H Menezes, Brian J Dlouhy
Feb 12, 2017·Anatomical Science International·Jocelyn GonzalesR Shane Tubbs
Jan 15, 2020·Case Reports in Orthopedics·Celeste TavolaroCarlo Bellabarba
Mar 17, 2017·Surgical and Radiologic Anatomy : SRA·Sibel CirpanA Orhan Magden
Aug 21, 2020·Surgical and Radiologic Anatomy : SRA·Sepideh DadgarFarhad Sobouti
Oct 17, 2020·Curēus·Vera VigoRoberto Rodriguez Rubio
May 24, 2021·World Neurosurgery·Andrei Fernandes JoaquimJefferson Walter Daniel

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Methods Mentioned

BETA
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