Status post tumor resection Five lumbar type vertebral bodies are present. Again seen is anterolisthesis of L5 on S1 with evidence of bilateral posterior spinal fusion at this level. Vertebral body heights and alignment in the remainder of the lumbar spine are normal. There is disk desiccation at L4-L5 which is unchanged. The conus medullaris is normal in position and signal intensity.Previously seen enhancing mass along the left L5-S1 has been resected. Susceptibility artifact from hardware limits evaluation; however, there appears to be gross total resection of the tumor. Left sided rod also appears to have been removed but difficult to evaluate; CT or radiographs can better assess the hardware. Epidural soft tissue enhancement seen at the L5-S1 level compatible with scar tissue and venous plexus.Expected post surgical changes include paraspinous fluid collection. No large epidural hematoma or evidence of significant mass effect on the thecal sac is seen.Mild 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: Disk desiccation and trace disk bulge. No spinal canal or neural foraminal stenosis.L5-S1: Postoperative changes as described above. No significant spinal canal or neural foramina stenosis is seen. Extensive epidural enhancement is compatible with scar tissue and epidural venous plexus.
Interval postsurgical changes of resection of enhancing mass in the left L5-S1 neural foramina, presumably a nerve sheath tumor. Susceptibility artifact slightly limits evaluation however no residual tumor is appreciated.Prior posterior spinal spinal fusion at L5-S1 related to L5 on S1 anterolisthesis. CT or radiographs can better assess the hardware and fusion if clinically indicated.