degenerative lower lumbar spinedegenerative osteoarthritis spinedegenerative lumbar spondylosisdegenerative spine conditionsdegenerative arthritis of the spinedegenerative cervical spine diseasedegenerative scoliosis lumbar spinesevere degenerative spine diseasethoracic spine degenerative diseasedegenerative spinal stenosisdegenerative spine disorderdegenerative narrowing of the spine