Legend Sagittal T2WI and T1WI images show disc material protruding beyond the expected posterior margin with superior extension at L5-S1. This causes mild central canal narrowing.

Legend Left: Sagittal and Axial T1WI again show the disc beyond the expected posterior margin. Right: Axial T2WIs show T2 hyperintensity within the posterior disc. The disc protrusion compresses the right S1 nerve root sleeve and also extends superiorly (lower image). Key words: mri lumbar degenerative

Spine Diagnosis: Disk extrusion