Female, 61 years old, with left lower extremity pain status post spinal fusion. Posterior fusion instruments are in place at L5 and S1. Evidence of left partial laminectomy/facetectomy is also seen at this level. Spinal alignment is anatomic. Vertebral body heights are grossly preserved. No concerning marrow replacement or evidence of marrow edema is seen.Visualized distal spinal cord, conus and nerve roots of the cauda equina are within normal limits. No epidural abnormalities are suspected. Tarlov cysts are seen within the sacral spinal canal and along the left S2 nerve root.L1-2: Unremarkable. L2-3: Mild facet hypertrophy and ligamentum flavum thickening. Otherwise unremarkable. No interval changes. L3-4: Mild facet hypertrophy and ligamentum flavum thickening. Otherwise unremarkable. No significant changes. L4-5: Moderate facet hypertrophy and ligamentum flavum thickening. No significant spinal canal stenosis. Possible mild bilateral foraminal narrowing. L5-S1: Postoperative findings as above. Ill-defined soft tissue thickening is seen within the left facetectomy bed extending to some degree into the left neural foramen. Prominent dark signal within the disc space and endplate irregularity are compatible with interbody fusion. There is a small central disc protrusion and perhaps also a small left foraminal protrusion. No significant generalized spinal canal stenosis is seen. The left neural foramen is partly obscured by metallic artifact, though some degree of foraminal narrowing is suspected. The right neural foramen is only mildly narrowed.
1.Evidence of instrumented posterior fusion and interbody fusion is seen at L5-S1.2.Findings compatible with left facetectomy are also noted at L5-S1. The left neural foramen is partially obscured by metallic artifact, but at least some degree of left foraminal narrowing is suspected. This may be due to a combination of residual disc disease and scarlike soft tissue thickening within the operative bed.3.No significant spinal canal or foraminal stenosis is seen at any other level.