Three-dimensional computed tomography angiographic study of the vertebral artery in patients with congenital craniovertebral junction anomalies

To describe vertebral artery (VA) course at the C0–C1–C2 complex in patients with congenital bony craniovertebral junction (CVJ) anomalies. We studied the course of 169 VAs in 86 patients with congenital bony CVJ anomalies [basilar invagination (42), os odontoideum (33), and irreducible atlantoaxial dislocation (11)]. Occipitalized atlas occurred in 41 patients (30 complete and 11 partial). Using axial, coronal and sagittal three-dimensional...