Mild to moderate scoliosis convex to the left. Vertebral height, alignment and intervertebral disc height as are within normal limits. Modic type II changes at L4 inferior and L5 superior endplates. Transitional lumbosacral anatomy is suspected, with the lowest disc level designated L5-S1. With this designation, the right hemilaminectomy has been performed at L4-5 and the conus terminates at the T12 level and is normal in appearance.
T12/L1 - L2/3: Unremarkable.
L3/4: mild focal central disc protrusion. No central canal or foraminal stenosis.
L4/5: large left paracentral focal disc extrusion impinging the descending left L5 nerve root in its lateral recess and also contacting the descending left S1 nerve root, which proximal to the impingement is prominently enhancing. Minimal epidural scar tissue. No central canal or foraminal stenosis.
Conclusion: Significantly larger left paracentral focal disc extrusion impinging the descending left L5 nerve root in the lateral recess with enhancement of this compressed nerve root.