69-year-old female with left buttock pain radiating down left lateral leg. Evaluate for nerve entrapment, osteoarthritis. Five lumbar type vertebral bodies are presumed to be present which are appropriate in overall alignment and height. The conus medullaris on sagittal imaging is grossly intact.At L1-2 there is no significant compromise to spinal canal or neural foramina.At L2-3 there is no significant compromise to spinal canal or neural foramina.At L3-4 there is mild disk disease with loss of disk height, mild to moderate ligamentum flavum hypertrophy and facet hypertrophy. A right facet effusion is also noted. There is grade 1 anterolisthesis of L3 on L4. Constellation of findings result in moderate central canal stenosis. No significant neuroforaminal compromise is seen.At L4-5 there is moderate disk disease with loss of disk height, moderate ligamentum flavum and facet hypertrophy. Grade 1 anterolisthesis of L4 on L5. There is no significant spinal canal stenosis. Mild right neuroforaminal compromise is present.At L5-S1 there is mild disk disease with loss of disk height, mild facet and ligamentum flavum hypertrophy, left greater than right. There is a large, broad-based disk protrusion in the midline and to the left, with effacement of the left lateral recess resulting in subtle mass effect on the descending S2 nerve root. No significant canal stenosis or neuroforaminal compromise is present.
1.Disk protrusion at L5-S1 results in effacement of the left lateral recess and subtle mass effect on the descending left S2 nerve root.2.Other degenerative changes, as above.