Vertebral body height and bone marrow signal is normal. Intravertebral disc space height and signal is normal. Conus terminates at L1 and has a normal appearance.
L4-5: Focal right paracentral disc extrusion extends inferiorly and impinges the descending right L5 nerve root in the right lateral recess. No significant central canal or foraminal narrowing.
L5-S1: Broad-based posterior disc bulge, eccentric on the left, results in mild left foraminal narrowing but no significant nerve impingement. No central canal narrowing.
All other levels are unremarkable with a capacious spinal canal and intervertebral foramina. No retroperitoneal abnormality noted.