| Risk Factors
Cauda equina syndrome (CES) occurs when the nerve roots at the base of the spinal cord are compressed. Known as the cauda equina, this bundle of nerves is responsible for the sensation and function of the bladder, bowel, sexual organs, and legs. CES is a medical emergency. If treatment is not started to relieve pressure on the nerves, function below the waist may be lost.
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A common cause of CES is injury of a spinal disk on the nerve roots. A spinal disk is a semi-soft mass of tissue between the bones of the spine. These bones are known as the vertebrae. The disks act as the spine’s shock absorbers. When a disk spills out into the spinal canal, it can press against the bundle of nerves, causing CES. This syndrome may also be caused by:
- Accident that crushes the spine, such as a car accident or fall
- Penetrating injury, such as a knife or gunshot wound
Arthritis, such as
- Mass lesion, such as a blood clot
- Side effect of certain medications
Factors that may increase your risk of developing CES include:
- History of back problems, such as lumbar spinal stenosis
Degenerative disk disease
Birth defects, such as a narrow spinal canal or spina bifida
- Hemorrhages affecting the spinal cord
- Arteriovenous malformation
- Spinal surgery or spinal anesthesia
- Lesion or tumor affecting the spinal bones, spinal nerve roots, or cerebrospinal fluid (CSF)
- Infection affecting the spine
- Manipulation of the lower back—rarely
Symptoms may include:
low back pain
- Numbness or tingling in the crotch area known as saddle anesthesia/paresthesia
- Inability to urinate, or to hold urine or feces
- Inability to walk or dragging of foot
- Weakness, loss of sensation, or pain in one or both legs
Sexual dysfunction; in men, the
inability to maintain an erection
Your doctor will ask about your symptoms and medical history. A physical exam will be done. A neurological exam, which includes testing reflexes, vision, mental status, and strength, may also be done. A rectal exam may be done to assess sphincter function.
Images may be taken of your bodily structures. This can be done with:
Your muscle activity may be measured. This can be done with electromyography.
Talk with your doctor about the best treatment plan for you. Treatment options include the following:
- Laminectomy—a surgical procedure to remove a portion of a vertebra, called the lamina
- Diskectomy—a surgical procedure to remove part of an intervertebral disk that is putting pressure on the spinal cord or nerve root
Radiation therapy—If CES is due to cancer, radiation therapy may be an option.
Your doctor may also treat the underlying cause of CES.
The long-term effects of CES can range from mild to severe. Problems may include:
- Difficulty walking
- Problems with bladder and bowels
- Sexual dysfunction
Your follow-up care may involve working with a:
- Physical therapist
- Occupational therapist
- Incontinence specialist—if you have lost bladder control
Your doctor may prescribe medication for:
- Bladder and bowel difficulties
There is no way to prevent CES.