Definition

Spinal stenosis is a narrowing of the spinal canal. This can put pressure on the nerves or spinal cord.

Spinal Stenosis Copyright © Nucleus Medical Media, Inc.

Causes

Some people are born with a small spinal canal. It can also happen with aging. Other things that may cause it are:

• Osteoarthritis and osteophytes (bony spurs) from aging
• Rheumatoid arthritis
• Spinal tumors
• Trauma
• Paget disease of the bone

Risk Factors

It is most common in people over 60 years of age. Things that may raise the risk are:

• Defects in the spine
• Prior injury or surgery of the spine
• Having Paget disease of the bone
• Achondroplastic dwarfism
• Acromegaly—too much growth hormone

Symptoms

Spinal stenosis causes pain and other symptoms. Stenosis can occur anywhere along the spinal cord. It is most common in the low back (lumbar) region.

Spinal stenosis may cause:

• Spreading pain in the lower back, buttock, or lower limb
• Burning
• Problems walking
• Numbness, tingling, or loss of feeling in the feet
• Weak muscles

Diagnosis

The doctor will ask about your symptoms and health history. A physical exam will be done.

Images may be taken of your spinal canal. This can be done with:

• MRI scan
• CT scan

The electrical activity of your nerves, nerve roots, and muscle tissue may be measured. This can be done with electromyography.

Treatment

There is no cure. The goal of treatment is to ease symptoms. Options may be:

• Medicine to ease pain and swelling
• A corset or brace to keep the spine stable
• Exercises to keep the spine stable and promote strength and motion

Prevention

There are no guidelines to prevent spinal stenosis.