Keywords
basilar invagination - endonasal - endoscope - odontoidectomy - transnasal
Fig. 1 (A) Preoperative sagittal T2 MRI showing the basilar invagination associated to Chiari
malformation. (B) Preoperative coronal CT image showing the assimilation of C1 to the skull base.
(C) X-Ray showing occipitocervical fusion. (D) Postoperative coronal CT image showing odontoid process removed. CT, computed tomography;
MRI, magnetic resonance imaging.
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