Spinal stenosis.

 

Spinal stenosis is a condition where the space around the spinal cord (the spinal column) narrows, compressing a section of nerve tissue.
The main symptoms of spinal stenosis are pain, numbness, weakness and a tingling sensation in one or both legs. This can make walking difficult and painful.
Most cases of spinal stenosis occur in older people. As you get older, the bones and tissues that make up the spine can become worn down, which can lead to a narrowing of the spinal column.
 
Laminectomy surgery.

Laminectomy is surgery that creates space by removing bone spurs and tissues associated with arthritis of the spine. It usually involves removing a small piece of the back part (lamina) of the small bones of the spine (vertebrae). Laminectomy enlarges the spinal canal to relieve pressure on the spinal cord or nerves. Laminectomy is often done as part of a decompression surgery.

This pressure is most commonly caused by bony overgrowths within the spinal canal, which can occur in people who have arthritis in their spines. These overgrowths are sometimes called bone spurs. They're a side effect of aging for some people. Bone spurs can also be inherited.

Laminectomy is generally used only when more-conservative treatments — such as medication, physical therapy or injections — have failed to relieve symptoms. Laminectomy might also be recommended if symptoms are severe or getting much worse.