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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. 1. — Images of a 50-year-old female patient. (A) Computed tomography (CT) scan with the head in neutral position showing abnormal increase in the atlantodental interval. There is assimilation of atlas and C2–3 fusion. Posterior foramen magnum decompression has been done. (B) CT scan with sagittal cut passing through the facets showing facet of atlas dislocated anterior to facet of axis – type 1 atlantoaxial facetal dislocation. (C) T2-weighted magnetic resonance imaging showing neural indentation by the odontoid process. (D) Postoperative CT scan showing reduction in atlantoaxial dislocation and craniovertebral junction realignment. (E) Postoperative CT scan showing the implant. The facets are now in alignment.