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OBJECTIVE  Degenerative cervical spondylotic myelopathy (CSM) is a major cause of spinal cord dysfunction with an unpredictable prognosis. Βiomarkers reflecting pathophysiological processes in CSM have been insufficiently investigated. It was hypothesized that preoperative cerebrospinal fluid (CSF) biomarker levels are altered in patients with CSM and correlate with neurological status and outcome.    METHODS  CSF biomarkers from patients with CSM and controls were analyzed with immunoassays. Spinal cord changes were evaluated with MRI. The American Spinal Cord Injury Association Impairment Scale, the Japanese Orthopaedic Association Cervical Myelopathy Evaluation Questionnaire (JOACMEQ), and the EQ-5D questionnaire were applied prior to and 3 months after surgery. A p value &lt; 0.05 was considered statistically significant.    RESULTS  Twenty consecutive CSM patients with a mean age of 67.7 ± 13 years and 63 controls with a mean age of 65.2 ± 14.5 years (p &gt; 0.05) were included in the study. In the CSM subjects, CSF neurofilament light subunit (NF-L) and glial fibrillary acidic protein (GFAP) concentrations were higher (p   20).    CONCLUSIONS  CSF biomarkers of glial and axonal damage, inflammation, and synaptic changes are altered in symptomatic CSM patients, indicating that axonal injury, astroglial activation, and Aβ dysmetabolism may be present in these individuals. These findings reflect CSM pathophysiology and may aid in prognostication. However, future studies including larger patient cohorts, postoperative biomarker data and imaging, and longer follow-up times are required to validate the present findings.

Cerebrospinal fluid biomarkers of glial and axonal injury in cervical spondylotic myelopathy