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TECHNICAL NOTE
Year : 2021  |  Volume : 8  |  Issue : 4  |  Page : 46-49

“Crossed C1 Lateral Mass–C2 Subfacetal Screw and Rod Construct” for Atlantoaxial Fixation in Patients with High-Riding Vertebral Artery: A Technical Note


1 Associate Professor, Department of Neurosurgery, Government Medical College Kottayam, Kerala, India
2 Senior Resident, Department of Neurosurgery, Government Medical College Kottayam, Kerala, India
3 Professor, Department of Neurosurgery, Government Medical College Kottayam, Kerala, India

Correspondence Address:
Geo Paul Kurikkattayil Jose
Senior Resident, Department of Neurosurgery, Government Medical College Kottayam, Kerala
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/joss.joss_7_21

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Background: Goel–Laheri's posterior C1/C2 fixation technique is the gold standard procedure for atlantoaxial dislocation (AAD) and basilar invagination. Coexisitng vertebral artery anomalies such as high-riding vertebral arteries pose an increased risk of vertebral artery injury during instrumentation. Alternate technique for avoiding vertebral artery injury in such cases like translaminar screw fixation had been associated with a high chance for screw pull out, resulting in an unstable construct. This case report introduces a novel, cost-effective technique of atlantoaxial fixation with a “bilateral crossed C1 lateral mass-C2 subfacetal screw and rod construct” in patients with atlantoaxial subluxation with high-riding vertebral arteries. Case Presentation: A 63-year-old male presented with complaints of neck pain and difficulty in walking. On physical examination, he had features of high cervical myelopathy. Imaging revealed AAD with bilateral high-riding vertebral arteries. He was treated with “Crossed C1 lateral mass-C2 subfacetal screw and rod fixation” without evidence of vertebral artery injury or neurological deficits. Postoperatively, the patient showed significant improvement in pain and Nurick score. Conclusions: This technique has the uniqueness of providing a stable, rigid fixation of the atlantoaxial joint with screws inserted into the C2 body providing good bone purchase and at the same time avoid vertebral artery injury in high riding cases. The surgical technique is demonstrated in a detailed manner in this technical note.


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