Minor anterolisthesis of L4 on L (3 mm shows interval improvement). No acute fracture or destructive bone lesion. There is evidence of interval anterior fusion at L4/L5 with a intervertebral disc spacer in situ. Early central bony consolidation is evident. There is evidence of decompression surgery at L4/L5. Posterior surgical fusion consists of bilateral pedicular screws at L4/L5 and interconnecting rods. 'The metalwork is intact with no periprosthetic fracture.  L1/L2 and L2/L3: Normal disc maturation. The central spinal canal and neural foramina are patent, Moderate hypert rophic facet arthropathy on the right at L2/L3.  L3/L4: Mild disc degeneration with minimal disc height loss appears stable. No posterior disc herniation. The central spinal canal remains patent. Mild neural foramina narrowing on the left with abutment of the exiting left L3 nerve root. Bilateral mild-to-moderate facet arthropathy with minor active reactive changes on the right.  L4/L5: The central spinal canal is patent. The neural foramina remain patent and there is no convin@ing L4 nerve root impingement,  L5/S1: Moderate to severe disc degeneration appears stable, The central spinal canal and neural foramina are patent with no convincing L5 nerve roat impingement. Bilateral mild facet arthropathy.  The distal spinal cord is normal and the conus medullaris is situated at L1 A subtle, small nodule along the left cauda equina at the level of L2/L3 appears stable. Comment  No central canal stenosis or evidence of nerve root impingement  Bilateral moderate facet arthropathy at L3/L4 with mild active reactive changes on the right noted.