 The vertebral column alignment is within normal limits. The vertebral body heights are preserved. There is moderate loss of disc height at L3-L4 and mild loss of disc height at L4-L5. The vertebral bone marrow signal is heterogeneous. There is a Schmorl's node at L5. There is no significant spinal canal stenosis. The spinal cord displays normal signal and morphology. There is a small Tarlov cyst at the S3 level incidentally noted. The paravertebral soft tissues are unremarkable.L1-L2: Mild facet arthropathy. No significant disc bulge, spinal canal or foraminal stenosis.L2-L3: Disc bulge, thickening of the ligamentum flavum and mild bilateral facet arthropathy. No significant spinal canal or foraminal stenosis. L3-L4: Disc bulge eccentric to the left and extending into the neural foramen as well as effacing the left lateral recess. There is also thickening of the ligamentum flavum and mild bilateral facet arthropathy, contributing to mild spinal canal stenosis and moderate left foraminal stenosis. L4-L5: Mild disc bulge eccentric to the right. There is also thickening of the ligamentum flavum and mild bilateral facet arthropathy, contributing to mild spinal canal and mild right foraminal stenosis. L5-S1: No significant disc bulge, spinal canal or foraminal stenosis.
1. Degenerative changes of the lumbar spine, most severe at L3-L4, with disc bulge eccentric to the left extending into the neural foramen and effacing the left lateral recess with thickening of the ligamentum flavum and mild bilateral facet arthropathy. There is resulting mild spinal canal stenosis and moderate left foraminal stenosis. 2. At L4-L5, there is mild disc bulge eccentric to the right with thickening of the ligamentum flavum and mild bilateral facet arthropathy, contributing to mild spinal canal and mild right foraminal stenosis at this level. 