 Redemonstrated is posterior spinal fusion at L4-S1, utilizing posterior fusion rods, bilateral pedicle screws, interbody spacer devices and bone graft material. There is unchanged mild anterolisthesis of L4 on L5. The vertebral body heights are maintained. There is moderate loss of disc height at L5-S1 with disc dessication and endplate degenerative changes. There is degenerative spondylosis of the lower lumbar spine. The distal spinal cord and conus are within normal limits with the conus terminating at the L1 level. There is edema at the posterior subcutaneous soft tissues. T12-L1: No significant disc bulge, spinal canal or foraminal stenosis. L1-L2: Bilateral facet degeneration. No significant disc bulge, spinal canal or foraminal stenosis. L2-L3: Bilateral facet degeneration, and thickening of the ligamentum flavum. No significant disc bulge, spinal canal or foraminal stenosis. L3-L4: Disc bulge, thickening of the ligamentum flavum and bilateral facet degeneration. No significant spinal canal or foraminal stenosis.  L4-L5: Bilateral facet degeneration. No significant disc bulge, spinal canal or foraminal stenosis. L5-S1: Bilateral facet degeneration and marginal osteophytes, contributing to mild bilateral neural foraminal narrowing. No significant spinal canal stenosis.
1. Posterior spinal fusion at L4 through S1.2. Degenerative spondylosis with bilateral mild neural foramen narrowing at L5-S1. No significant spinal canal stenosis. This is stable compared to the prior exam.