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in, limb numbness and weakness, neural symptoms, etc. were improved to different degrees after operation. The JOA score was improved to 13.4±1.9 at 3 months after operation, showing significant difference when compared with preoperative score ( t=8.677, P=0.00; and the atlantoaxial joints had been fused. At last follow-up, the ASIA grades were improved when compared with those before operation. Conclusion It is safe and effective to cut the posterior pharyngeal muscle layer and implant internal fixation by