Right lower extremity numbness and weakness Five lumbar type vertebral bodies are presumed to be present. Vertebral body heights are within normal limits. There is grade 1 anterolisthesis of L4 on L5, which appears worse. Alignment is otherwise maintained. Bone marrow signal is benign. The conus medullaris is normal in position. Small perineural cyst is again incidentally noted involving the right T11-T12 neural foramen.Multilevel degenerative changes are seen, as described below:L1-L2: No significant disc disease. No spinal canal or neural foraminal stenosis.L2-L3: Mild disc bulge. No spinal canal or neural foraminal stenosis.L3-L4: Mild disc bulge, facet arthropathy, and ligamentum flavum thickening. No significant spinal canal stenosis. Minimal bilateral neural foraminal narrowing.L4-L5: There is advanced bilateral facet arthropathy with fluid distending the facet joints similar to prior. Previously seen small synovial cyst projecting into the spinal canal on the right is no longer appreciated. There is grade 1 anterolisthesis which appears new since prior MRI. There is also ligamentum flavum thickening and mild disc bulge at this level, minimally worse. There is resulting moderate spinal canal stenosis including effacement of the lateral recesses, which has progressed since prior study from 9/19/2012. There is mild bilateral neural foraminal stenosis. L5-S1: There is bilateral facet arthropathy with tiny synovial cyst similar to prior. There is minimal disc bulge and ligamentum flavum thickening. No significant spinal canal or neural foraminal stenosis.
Multilevel degenerative changes in the lumbar spine are again seen. Compared to 9/19/2012, there has been mild worsening of the moderate spinal canal stenosis at the L4-L5 level including effacement of the lateral recesses. There is grade 1 anterolisthesis at this level which appears new. There is mild bilateral L4-L5 neural foraminal stenosis. No high-grade neural foraminal stenosis at any level.