Comparison of sagittal vertical axis and decompression on the clinical outcome of cervical spondylotic myelopathy.

Objective: Decompression and cervical balance are major goals in the surgical treatment of cervical spondylotic myelopathy (CSM). Cervical balance is assumed to be a key factor for neurological recovery and pain reduction. Surgical reduction of C2-7 sagittal vertical axis (SVA) correlates with clinical improvement.