 The last well formed disk space is referred to as L5-S1. There is a 3-mm retrolisthesis of L5 on S1 with disk desiccation and mild loss of disk height at L5-S1. Disk heights and signal at other levels are preserved. Vertebral body heights are preserved. The conus terminates at inferior L2 level, at the lower limits of normal, although still within normal limits.T12-L1: No disk herniation or spinal stenosis.L1-2: No disk herniation or spinal stenosis.L2-3: Mild posterior epidural fat, ligamenta flava thickening and mild bilateral facet arthropathy with no significant spinal stenosis.L3-4: Mild diffuse disk bulge, bilateral facet arthropathy and prominence of posterior epidural fat causing no significant spinal stenosis.L4-5: Diffuse disk bulge, ligamenta flava thickening, moderate bilateral facet arthropathy causing mild spinal canal and bilateral neural foraminal stenosis. Disk material encroaches upon the bilateral subarticular zones without significant nerve root impingement.L5-S1: Diffuse disk bulge with central disk protrusion causing no significant spinal canal stenosis. Moderate bilateral facet arthropathy causing mild to moderate bilateral neural foraminal stenosis, right greater the left.
Multilevel lumbar spondylosis as described above, worst at L4-5 where there is mild spinal canal and bilateral neural foraminal stenosis. Please see details above.