History of anterior lumbar fusion. Back pain and leg pain. Five lumbar type vertebral bodies are presumed to be present. Vertebral body heights are within normal limits. There are postsurgical changes of anterior lumbar interbody fusion at L5-S1 for isthmic spondylolisthesis, with solid osseous fusion as seen on CT. There is minimal retrolisthesis of the lumbar vertebral bodies between L1 to L5 as seen on CT. 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. 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: No significant disc disease. No spinal canal or neural foraminal stenosis.L5-S1: Post ALIF. No spinal canal stenosis. Minimal right neural foraminal narrowing. No significant left neural foraminal narrowing.Paraspinous soft tissues are within normal limits.
1. Status post L5-S1 ALIF with solid osseous fusion better demonstrated on CT from same day.2. Minimal right L5-S1 neural foraminal narrowing. Otherwise no significant spinal canal or neural foramina stenosis at any level in the lumbar spine.