Lumbar spine MRI showing a foraminal disc extrusion compressing the exiting L5 nerve root

Sagittal T1-weighted MRI of the lumbar spine shows a foraminal disc extrusion filling the L5-S1 neural foramen (arrow), likely compressing the exiting L5 nerve root. Note hyperintense fat surrounding the normal exiting L4 nerve root at the level above (arrowhead).