Female, 41 years old.Weakness, radicular pain. Five lumbar type vertebral bodies are presumed to be present. The lumbar spine is in normal alignment, with a normal lumbar lordosis. The vertebral body and disk heights are well-maintained. The conus medullaris terminates at the L1-2 level. At T12-L1 through L4-5, there is no significant compromise to spinal canal or neural foramina. There is mild chronic marrow reactive change at the inferior endplate of L5. At L5-S1, there is a broad-based left latera recess disk extrusion which effaces the fat of the left lateral recess and posteriorly displaces the descending left S1 nerve root. The extrusion crosses midline, mildly effacing the fat of the right lateral recess as well. There is mild bilateral neural foraminal narrowing at this level, but the exiting L5 nerve roots are surrounded by fat.
Disc extrusion at L5-S1 leading to encroaching the nerve roots at the left lateral recess and to a lesser degree the right lateral recess and posterior displacement of the descending left sided S1 nerve roots.