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Updated: Jun 8, 2025
Anterior Cervical Discectomy and Fusion in the Ovine Model
Published on: October 5, 2009
Does snake-eye appearance affect the clinical outcome of ACDF in treating cervical myelopathy
Baifeng Sun1, Aochen Xu1, Cheng Cui1
1Department of Orthopedics, Changzheng Hospital Affiliated to Second Military Medical University, 415th Feng Yang Road, Shanghai, 200003, PR China.
Purpose:
To explore the impact of the snake-eye appearance (SEA) on the efficacy of anterior cervical discectomy and fusion (ACDF) in treating Degenerative Cervical Myelopathy (DCM).
Methods:
A total of 316 Patients were divided into three groups, those with SEA were in the SEA group, and those with the absence of SEA were in the non-SEA group. Meanwhile, in the non-SEA group, patients with grade 1 or 2 increased signal intensity (ISI) on T2-weighted MRI were in the ISI group, and the remaining patients without ISI were in the non-ISI group. The modified Japanese Orthopaedic Association scale (mJOA) and the neurologic functional improvement rate (IR) were measured. The number of patients who achieved upper-limb motor weakness improvement was recorded and compared. Propensity score matching (PSM) was used among the three groups.
Results:
The postoperative JOA and IR were similar in the SEA and non-SEA group; however, they were significantly lower than in the non-ISI group after PSM(P < 0.05). Besides, only 32.1% of patients in the SEA obtained an improvement of upper-limb motor weakness, which was the lowest in three groups after PSM (60.7% in the non-SEA group and 78.6% in the non-ISI group, P < 0.05).
Conclusions:
We suggested that patients with SEA tend to achieve an inadequate neurological recovery after ACDF. Besides, a SEA may be an unfavorable prognostic factor for upper extremity motor function recovery.
