Left leg numbness and tingling. There is straightening of the vertebral column in the sagittal plane. The vertebral body heights are preserved. There is multilevel degenerative spondylosis. At T12-L1 and L1-L2, there is mild facet arthropathy, but no significant spinal canal or neural foraminal stenosis. At L2-L3, L3-L4 and L4-L5, disc bulges, mild ligamentum flavum thickening, and mild facet arthropathy result in mild spinal canal and neural foraminal stenoses. At L5-S1, a left paracentral disc extrusion narrows the subarticular recess and posteriorly displaces the traversing left S1 nerve root. Otherwise, the disc bulge and the facet arthropathy result in mild central spinal canal and mild bilateral neural foraminal stenosis. In addition to multilevel degenerative, there is suggestion of mild congenital spinal canal stenosis. The tip of the conus medullaris is located at the lower L1 level, which is normal. A 1 cm well-circumscribed, homogeneously T2-hyperintense, T1-hypointense lesion anterior to the left kidney may represent anesthetic renal cyst, but is not completely assessed.
Multilevel degenerative lumbar spondylosis is most pronounced at L5-S1, where a left paracentral disc extrusion displaces the traversing left S1 nerve root. Furthermore, the disc bulges superimposed on congenitally narrow spinal canal result in mild spinal canal and neural foraminal stenoses at L2-L3 through L4-L5.