Lumbar Spinal Stenosis

//Lumbar Spinal Stenosis

What is?

Lumbar spinal stenosis is caused by the hypertrophy of the facets and ligamentum flavum and thus, narrowing of the AP dimension of the spinal canal occurs. The reduction in canal size causes local neural compression and compromise of the blood supply. This condition may be exacerbated by a bulging disc or spondylolisthesis

Normal
Stenosis - Hypertrophic ligaments

In the lumbar spine symptomatic stenosis produces neurogenic claudication with gradually progressive back and leg pain and numbness when standing or walking, that is relieved by sitting.

Normal
Stenosis

The lumbar spinal stenosis is most common at L3-L4 and L4-L5. Surgery is indicated when the symptoms become severe, and consists of lumbar spine decompression and possible instrumentation.