 - A prior spine MRI or CT any region with evidence of significant pathology of the spinal cord, roots, or elements of the spinal column to include; impingement on the spinal cord or nerve roots, intrinsic pathology of the spinal cord e.g. syrinx or nerve roots, evidence of a neoplastic or infectious process involving the spinal cord or nerve roots or structural elements of the spine e.g. vertebra or intervertebral disks, or any deformities of the bony or supporting elements of the spinal column that deform the spinal cord or the nerve roots. Nonspecific degenerative changes of the spine, Schmorls nodules, and other similar findings that do not impinge upon or involve the spinal cord or nerve roots will not be considered exclusionary. 