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  Indian J Med Microbiol
 

Figure 2: Images of a 15-year-old female patient. (a) Computed tomography scan shows assimilation of atlas, Group A basilar invagination, increased atlantodental interval and fusion of vertebral bodies C6–T1. (b) Computed tomography scan with the cut passing through the facets showing atlantoaxial facetal instability. (c) T2 weighted magnetic resonance imaging showing basilar invagination, Chiari formation and syringomyelia. (d) Three-dimensional computed tomography scan showing the omovertebra arising from the C5 body and travelling toward the scapula. (e) Computed tomography angiography showing the abnormal course of the vertebral artery on the left side. (f) Postoperative computed tomography scan showing reduction of the instability and fixation. (g) Postoperative computed tomography scan image showing the implant. (h) Antero-posterior view of postoperative computed tomography scan showing C1 lateral mass and C2 pedicle screw fixation on one side and C1–C2 transarticular fixation on the other side

Figure 2: Images of a 15-year-old female patient. (a) Computed tomography scan shows assimilation of atlas, Group A basilar invagination, increased atlantodental interval and fusion of vertebral bodies C6–T1. (b) Computed tomography scan with the cut passing through the facets showing atlantoaxial facetal instability. (c) T2 weighted magnetic resonance imaging showing basilar invagination, Chiari formation and syringomyelia. (d) Three-dimensional computed tomography scan showing the omovertebra arising from the C5 body and travelling toward the scapula. (e) Computed tomography angiography showing the abnormal course of the vertebral artery on the left side. (f) Postoperative computed tomography scan showing reduction of the instability and fixation. (g) Postoperative computed tomography scan image showing the implant. (h) Antero-posterior view of postoperative computed tomography scan showing C1 lateral mass and C2 pedicle screw fixation on one side and C1–C2 transarticular fixation on the other side