Spinal stenosis Five lumbar type vertebral bodies are presumed to be present. Vertebral body heights are within normal limits. There is grade 1 anterolisthesis of L4 on L5. Alignment is otherwise maintained. Bone marrow signal is benign. The conus medullaris is normal in position.Multilevel degenerative changes are seen, as described below:L1-L2: No significant disc disease. Mild ligamentum flavum thickening and facet arthropathy. No spinal canal or neural foraminal stenosis.L2-L3: Minimal disc bulge, ligamentum flavum thickening, and facet arthropathy. No spinal canal or neural foraminal stenosis.L3-L4: Mild disc bulge, ligamentum flavum thickening, and facet arthropathy. No spinal canal or neural foraminal stenosis.L4-L5: There is advanced facet arthropathy with grade 1 anterolisthesis, mild disc bulge with central protrusion, and ligamentum flavum thickening which contribute to moderate to severe spinal canal stenosis at this level. There is mild distention of the left facet joint. There is mild right and minimal left neural foraminal stenosis.L5-S1: Mild disc bulge with a left paracentral disc protrusion component which effaces the left lateral recess. There is mild left and minimal right neural foraminal stenosis. No significant central spinal canal stenosis. Bilateral facet arthropathy.Paraspinous soft tissues are within normal limits.
1. Degenerative grade 1 anterolisthesis of L4 on L5 with moderate to severe spinal canal stenosis related to facet arthropathy, ligamentum flavum thickening, and central disc protrusion.2. Left paracentral disc protrusion at L5-S1 with partial effacement of the left lateral recess and milder degenerative changes at additional levels as detailed above.