Chronic posterior thigh pain Five lumbar type vertebral bodies are presumed to be present. There is grade 1 anterolisthesis of L4 and L5. There is levocurvature of the lumbar spine as seen on prior radiograph. Vertebral body heights are within normal limits. Bone marrow signal is benign with small hemangiomas noted at L3 and L4. The conus medullaris is normal in position.Multilevel degenerative changes are seen, as described below:L1-L2: Mild disk bulge. No spinal canal or neural foraminal stenosis.L2-L3: Mild disk bulge. No spinal canal or neural foraminal stenosis.L3-L4: Mild disk bulge, eccentric to the right. There is mild right and minimal left neural foramina narrowing. No significant spinal canal stenosis. Mild facet arthropathy.L4-L5: There is grade 1 anterolisthesis with disk uncovering and disk bulge. There is ligamentum flavum thickening and bilateral facet arthropathy. There is resulting moderate spinal canal stenosis. There is moderate bilateral neural foraminal stenosis.L5-S1: Disk bulge with minimal central protrusion component. There is bilateral facet arthropathy. There is minimal left and no significant right neural foraminal stenosis.Paraspinous soft tissues are within normal limits. Mild degenerative changes at the sacroiliac joints are also noted. Perineural cyst along the left S2 nerve is incidentally noted.
Degenerative changes in the lumbar spine with moderate spinal canal and moderate bilateral neural foraminal stenosis at L4-L5. There is grade 1 L4-L5 anterolisthesis likely on a degenerative basis.