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Cauda Equina Syndrome

Although low back pain is common and usually goes away without surgery, cauda equine syndrome, a rare disorder affecting the bundle of nerve roots (cauda equina) at the lower (lumbar) end of the spinal cord, is a surgical emergency.

An extension of the brain, the nerve roots send and receive messages to and from the pelvic organs and lower limbs. Cauda equina syndrome occurs when the nerve roots are compressed and paralyzed, cutting off sensation and movement. Nerve roots that control the function of the bladder and bowel are especially vulnerable to damage.

If patients with cauda equina syndrome do not get fast treatment to relieve the pressure, it can result in permanent paralysis, impaired bladder and/or bowel control, loss of sexual sensation, and other problems. Even with immediate treatment, some patient may not recover complete function.


Cauda equina syndrome may be caused by a ruptured disk, tumor, infection, fracture, or narrowing of the spinal canal. It may also happen because of a violent impact, such as a car crash, a fall from significant height, or a penetrating injury, such as a gunshot or stabbing injury. Children may be born with abnormalities that cause cauda equina syndrome.


Although early treatment is required to prevent permanent problems, cauda equina syndrome may be difficult to diagnose. Symptoms vary in intensity and may evolve slowly over time.

See your doctor immediately if you have:

  • Bladder and/or bowel dysfunction, causing you to retain waste or be unable to hold it.
  • Severe or progressive problems in the lower extremities, including loss of or altered sensation between the legs, over the buttocks, the inner thighs and back of the legs (saddle area), and feet/heels.
  • Pain, numbness, or weakness spreading to one or both legs that may cause you to stumble or have difficulty getting up from a chair.


To diagnose cauda equina syndrome, the doctor will probably evaluate your medical history, give you a physical examination, and order multiple diagnostic imaging studies.

Medical History

Describe your overall health, when the symptoms of cauda equina syndrome began, and how they impact your activities.

Physical Examination

The doctor assesses stability, sensation, strength, reflexes, alignment and motion. He or she may ask you to stand, sit, walk on your heels and toes, bend forward, backward and to the sides, and lift your legs while lying down. The doctor might check the tone and numbness of anal muscles. You may need blood tests.

Diagnostic Imaging

Your doctor may obtain X-rays, MRI (magnetic resonance imaging) scans, and CT (computed tomography scans to help assess the problem.


If you have cauda equina syndrome, you may need urgent surgery to remove the material that is pressing on the nerves. The surgery may prevent pressure on the nerves from reaching the point at which damage is irreversible.

Living With Cauda Equina Syndrome

Surgery will not repair permanent nerve damage. If this occurs as a result of cauda equina syndrome, you can learn how to improve your quality of life.

Some suggestions:

  • In addition to medical personnel, you may want to get help from an occupational therapist, social worker, continence advisor, or sex therapist.
  • Involve your family in your care.
  • To learn all you can about managing the condition, you may want to join a cauda equina syndrome support group.

Managing Bladder and Bowel Function

Some bladder and bowel function is automatic, but the parts under voluntary control may be lost if you have cauda equina syndrome. This means you may not know when you need to urinate or move your bowels, and/or you may not be able to eliminate waste normally.

Some general recommendations for managing bladder and bowel dysfunction:

  • Empty the bladder completely with a catheter 3 to 4 times each day. Drink plenty of fluids and practice regular personal hygiene to prevent urinary tract infection.
  • Check for the presence of waste regularly and clear the bowels with gloved hands. You may want to use glycerin suppositories or enemas to help empty the bowels. Use protective pads and pants to prevent leaks.


Information provided by the American Academy of Orthopedic Surgeons