What is the definition or description of: lumbar spine stenosis?

Lumbar stenosis: This is an abnormal narrowing of the lumbar spine that can lead to numerous nerve problems below the narrowed area.

Lumbar stenosis: Overgrowth of arthritis from joints, discs, ligaments, etc that causes pressure on nerves. Classically it is referred to as neurogenic claudication with pain in back and legs , worse with extension, better with flexion, distance limits on walking etc etc, should be differentiated from vascular problems in legs. Surgery can be min invasive or open with or without instrumentation.

Tight canal: The spinal cord is surrounded by a tube of bone made up the stacked vertebrae and called the spinal canal. If the canal is restricted and smaller due to injury, fracture, herniated disc, arthritic spurs, or simply being born that way then you have spinal stenosis. The stenosis threatens to pinch on the cord or nerves'.