Panel A shows narrowing of the L3–L4 disk space (arrow) on a plain roentgenograph of the lumbar spine of a patient who presented with back pain ... studies provide support for the overwhelming ...

The pain was relieved with sitting, but not standing. Lumbar Spinal Stenosis: T2-weighted MRI of the Lumbar Spine; (Left) Mid-sagittal view; (Right Top) Axial scan at the mid-L3 level; (Right Bottom) ...

Occurring predominantly at the L4–L5 and L3–L4 levels in almost equal numbers, they are occasionally noted at L5–S1. Clinical syndromes reflect compression of the superiorly exiting nerve ...