Female, 76 years old, with low back pain radiating to the left leg and numbness of the left foot. Trace anterolistheses of L3 relative to L4 and L4 relative to L5 are seen. Spinal alignment is otherwise anatomic.Vertebral body height and morphology are within normal limits. Marrow signal characteristics are unremarkable allowing for mild endplate edema along the anterior/inferior endplates of L4 and L5. Also noted is bilateral pedicle and facet complex edema at L5 and to a less degree at L4 and L3.The spinous processes are irregular with evidence of cortical and/or ligamentous thickening and mild marrow edema as well as scattered bony cysts at several levels.The visualized spinal cord and conus are within normal limits. The nerve roots of the cauda equina are dispersed evenly through the thecal sac.L1-2: Unremarkable. L2-3: Mild facet hypertrophy and ligamentum flavum thickening. No significant spinal canal or neuroforaminal stenosis. L3-4: Mild facet hypertrophy with a small facet effusion on the right and ligamentum flavum thickening. Subchondral cysts are evident along the right facet complex. Mild bulging disk. No significant generalized spinal canal stenosis. Mild bilateral foraminal narrowing. L4-5: Moderate to severe facet hypertrophy and ligamentum flavum thickening. Mild bulging disk. Moderate generalized spinal canal stenosis but without significant nerve root crowding. Mild right and moderate left foraminal narrowing. L5-S1: Moderate facet hypertrophy and ligamentum flavum thickening. No significant spinal stenosis. Moderate left and mild right foraminal narrowing.
1. Moderate to severe facet hypertrophy at lower lumbar levels with evidence of marrow edema. Abdomen contribute to mild to moderate foraminal narrowing as above.2. Degeneration of the spinous processes and interspinous spaces suggesting Baastrup disease.3. Relatively mild degenerative disk disease with no areas of high-grade spinal canal stenosis.