 There is mild anterolisthesis of L4 on L5 and mild retrolisthesis of L5 on S1. There is disc desiccation throughout the lumbar spine with moderate to severe loss of disc height at L3-L4, L4-L5 and L5-S1, which is progressed from prior study. The vertebral body heights are well-maintained. No worrisome focal marrow signal abnormality is appreciated. The distal spinal cord and conus are within normal limits with the conus terminating at the L1-L2 level. The cauda equina nerve roots are thickened and redundant.T12-L1: Bilateral facet degeneration, but no significant spinal canal or neural foraminal stenosis.L1-L2: Bilateral facet degeneration, but no significant spinal canal or neural foraminal stenosis.L2-L3: Unchanged disc bulge, bilateral facet degeneration and thickening of the ligamentum flavum, contributing to mild spinal canal stenosis and mild to moderate bilateral foraminal stenosis.L3-L4: Unchanged disc bulge, bilateral facet degeneration and thickening of the ligamentum flavum, contributing to moderate to severe spinal canal stenosis and moderate bilateral foraminal stenosis. There is effacement of the lateral recesses.L4-L5: Unchanged mild anterolisthesis of L4 on L5 with pseudo disc bulge, bilateral facet degeneration and thickening of the ligamentum flavum, contributing to severe spinal canal stenosis and moderate bilateral foraminal stenosis. There is effacement of the lateral recesses.L5-S1: Mild retrolisthesis of L5 on S1 with pseudo disc bulge, bilateral facet degeneration and thickening of the ligamentum flavum, contributing to mild spinal canal narrowing and moderate bilateral foraminal stenosis. There is effacement of the lateral recesses.
1. Interval progression of multilevel loss of disc height of the lower lumbar spine. Otherwise, no significant interval change in the advanced degenerative changes of the lumber spine, most prominent at L3-L4 and L4-L5 levels, resulting in moderate to severe spinal canal stenosis, moderate bilateral foraminal and bilateral lateral recess compromise. 2. Unchanged mild spinal canal narrowing at L2-L3 and L5-S1 with up to moderate bilateral foraminal stenosis.  