 There is flattening of the skull base/platybasia and a high riding anterior arch of C1. The tip of the dens situated posterior to the anterior lip of the foramen magnum, but there is no evidence of basilar invagination. The lateral masses of the atlas appear fused with the occipital condyles, although please note that detailed evaluation of the osseous anatomy is limited by MRI. Degenerative changes are noted at the atlantoaxial joint. There is straightening of the cervical spine. The cervical vertebral bodies are appropriate height. Bone marrow signal is within normal limits. The cervical spinal cord has normal signal characteristics and overall morphology.Degenerative changes are seen in the cervical spine as described below:C2-3: No significant compromise to the spinal canal or neural foramina.C3-4: Uncovertebral joint hypertrophy with mild to moderate right and mild left neuroforaminal narrowing. No spinal canal stenosis.C4-5: Mild degenerative disk disease and uncovertebral joint hypertrophy with mild bilateral neuroforaminal stenosis. Mild spinal canal stenosis.C5-6: Moderate degenerative disk disease and moderate right neuroforaminal narrowing. No significant spinal canal stenosis.C6-7: Moderate degenerative disk disease with a central and left paramedian disk protrusion. Mild bilateral neuroforaminal narrowing, as well as mild anterior flattening of the spinal cord indicating moderate spinal canal stenosis.C7-T1: Mild degenerative disk disease and moderate facet and ligamentum flavum hypertrophy. Mild bilateral left greater than right uncovertebral joint hypertrophy. Moderate left greater than right neuroforaminal stenosis and mild spinal stenosis. The vertebral artery flow voids appear to be intact. Paraspinous soft tissue structures appear within normal limits.
1. Atlanto-occipital fusion with associated platybasia but no basilar invagination or cord signal abnormality. Evaluation of the bony anatomy is limited by MRI and CT would be recommended for further evaluation if clinically warranted. 2. Multilevel degenerative changes with mild to moderate multilevel neuroforaminal narrowing and mild spinal canal stenosis, as described above.