PMC10290858_01
CT images revealing status post the initial surgery performed at another centre. Red arrows point to key abnormalities seen on the CT scans that underlay our decision to perform revision surgery: C2-C3 displacement/instability, fracture of the C2 vertebral body with detachment and anterior displacement of a part of the C2 body, fracture of the C2 pars interarticularis on the right, and incorrect location of screws within C2, with their ends seen within C1-C2 joint spaces, making it impossible for the patient to perform rotational head movements.
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C2 vertebra however, both screws were initially placed transpedicularly, but their ends did not reach the C2 vertebral body or lateral masses of C1 and extended into the left and right C1-C2 joint spaces. CT images of the status post initial surgery performed at another centre are shown in Figure 1.
Schematic of the surgery we performed and post-operative CT and X-ray images.
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Figure 2 presents a schematic of the procedure and postoperative X-ray and CT images.
Functional radiograph of cervical spine and photographs of the patient at 8 weeks after the procedure showing intact flexion/extension and rotational head movements.
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At present, the patient has functional flexion/extension and rotational head movements and cervical spine stability is also preserved (Figure 3).