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. 2019 Jun 30;16(2):186–194. doi: 10.14245/ns.1938138.069

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Copyright © 2019 by the Korean Spinal Neurosurgery Society

This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 3. — Images of a 33-year-old male patient. (A) T2-weighted magnetic resonance imaging (MRI) showing basilar invagination and Chiari formation. (B) Computed tomography (CT) scan showing basilar invagination. There is no abnormality in atlantodental interval. (C) The facets of atlas and axis are in alignment. Clinical and radiological features suggest type 3 atlantoaxial facetal instability. (D) Postoperative CT scan. (E) Postoperative CT scan showing the implant.