Spinal stenosis is a medical condition in which the spinal canal narrows and compresses the spinal cord and nerves. This is usually due to the natural process of spinal degeneration that occurs with aging. It can also sometimes be caused by spinal disc herniation, osteoporosis, or a tumour. Spinal stenosis may affect the cervical spine, the lumbar spine or both. Lumbar spinal stenosis results in low back pain as well as pain or abnormal sensations in the legs.
Cervical spinal stenosis
The main causes of cervical spinal stenosis (CSS) include cervical spondylosis, diffuse idiopathic skeletal hyperostosis (DISH), or calcification of the posterior longitudinal ligament.
CSS is more common in males than females, and is mainly found in the 40-60 year age group.
Signs of CSS include spastic gait; upper extremity numbness; upper extremity, lower extremity weakness or both; radicular pain in the upper limb; sphincter disturbances; muscle wasting; sensory deficits; and reflex abnormalities.
The best diagnostic and investigative tool is magnetic resonance imaging (MRI), while computed tomograghy (CT) is somewhat useful if MRI is unavailable.
If the problem is mild, treatment may be as simple as physical therapy and the use of a cervical collar. If severe, treatments include laminectomy, hemilaminectomy, or decompression.
Lumbar spinal stenosis
The main causes of lumbar spinal stenosis (LSS) include hypertrophy of the facet joints or osteoarthritis; spondylolisthesis; diffuse idiopathic skeletal hyperostosis (DISH); and degenerative disc disease.
Usually, this condition occurs after the age of 50, and both genders are equally affected.
Signs of LSS include neurogenic intermittent claudication that causes leg pain, weakness, tingling and loss of deep tendon reflexes. Many of these leg symptoms are referred to as sciatica. Low back pain may or may not be present. With lumbar spinal stenosis, the patient's pain usually is worse while walking and will feel better after sitting down. The patient is usually more comfortable while leaning forward, such as walking while leaning on a shopping cart.
Text and images are licensed under the GNU Free Documentation License. Material is used from the Wikipedia article "Spinal stenosis".
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