Key words from Topicsalignment anterior cervical fusion arachnoiditis bone harvest central canal cervical spine coccydynia coccygectomy coccyx cord cord compression cordoma decompression degeneration disability discectomy fall foramina gait disturbance Gill fragment injection instrumentation laminectomy laminotomy lateral recess lumbar lumbar fusion lumbosacral junction manipulations myelopathy nerve root neurogenic claudication pain pars defect pars intervertebralis radiculopathy spacer spinal instability spinal stability spondylolisthesis spondylolysis stenosis tailbone tumor vertebral