8 years of low back pain, assess for stenosis or nerve compression. Five lumbar type vertebral bodies are presumed to be present. Vertebral body heights are within normal limits. Alignment is within normal limits. 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. No spinal canal or neural foraminal stenosis.L2-L3: No significant disc disease. No spinal canal or neural foraminal stenosis.L3-L4: No significant disc disease. No spinal canal or neural foraminal stenosis.L4-L5: There is a right paracentral disc extrusion with mild superior migration. There is partial effacement of the right lateral recess but no significant central spinal canal stenosis. Neural foramina are also patent. There is suggestion of a tiny, 2 mm, cyst (possibly synovial cyst) adjacent to the ligamentum flavum on the left with minimal, if any mass effect on the adjacent cauda equina nerve roots.L5-S1: Small central/right paracentral disc protrusion. No significant spinal canal or neural foraminal stenosis.Paraspinous soft tissues are within normal limits.
Right paracentral disc extrusion at the L4-L5 level and smaller disc protrusion at the L5-S1 level. There is partial effacement of the right lateral recess at the L4-L5 level. Central spinal canal and neural foramina in the lumbar spine remain patent.