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. 2018 Nov 28;5:280. doi: 10.3389/fvets.2018.00280

Figure 3.

Figure 3

Diagnostic imaging from a 5 year female CKCS presented with lethargy, ataxia, cervicotorticollis, and phantom scratching and following MRI diagnosed with symptomatic CM and SM. (A) T2-weighted mid-sagittal MRI of the brain and cranial cervical spinal cord. (B) T2- weighted mid sagittal MRI of the hindbrain and spine from C1 to T10. (C) Lateral skull and cervical spinal radiograph flexed at the atlantoaxial joint. (D) Lateral skull and cervical spinal radiograph extended at the atlantoaxial joint. (E) CT reformatted in the sagittal plane of the skull and cervical spine. MRI imaging (A,B) confirmed CM and SM with a large mid cervical SM involving the superficial dorsal horn thus explaining the cervicotorticollis and phantom scratching (insert). MRI also suggested atlantoaxial instability with spinal cord compression by the odontoid peg. Atlantoaxial instability was confirmed by a dynamic radiographic study (C,D). The CT was obtained for pre-surgical planning. The dorsal displacement of the odontoid peg (asterisk) and dorsal opening (arrow) between the atlas and axis can be appreciated (Siemens Magnetom Symphony, A Tim System, 1.5 T, Erlangen, Germany; Toshiba Aquilion Prime 160 slice, Otawara, Japan).