 The last well formed disk space is referred to as L5-S1. There is normal alignment of the lumbar spine. The vertebral body heights are preserved. There are type I degenerative endplate changes at L4-5 with disk desiccation and severe loss of disk height. There is desiccation and moderate loss of disk height and L3-4, with disk desiccation at L5-S1 without significant loss of disk height. The conus terminates at T12-L1 and is normal.T12-L1: No disk herniation or spinal stenosis.L1-2: No disk herniation or spinal stenosis.L2-3: Mild disk bulge, facet arthrosis and ligamenta flava thickening which along with posterior epidural fat causes mild spinal canal stenosis. No significant interval changes.L3-4: Diffuse disk bulge, ligament flava thickening, mildly prominent posterior epidural fat and moderate facet arthrosis causing severe spinal canal stenosis and moderate to severe bilateral neural foraminal stenosis. Findings have progressed at this level.L4-5: Diffuse disk bulge, ligamenta flava thickening, moderate facet arthrosis causing severe spinal canal and severe neural foraminal stenosis. Findings have progressed at this level.L5-S1: Diffuse disk bulge, moderate facet arthrosis and ligamenta flava thickening causing no significant spinal stenosis. No significant interval changes.
Multilevel lumbar spondylosis, with progressive disease at L4-5 and L3-4 where there are high grade spinal canal and neural foraminal stenoses.