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Spinal stenosis is the narrowing of spaces in the spine (backbone) which causes pressure on the spinal cord and nerves. About 75% of cases of spinal stenosis occur in the low back (lumbar spine).
Spinal stenosis is a condition whereby there is abnormal narrowing in the spinal canal. This narrowing limits the amount of space available for the spinal cord and nerves. As spinal stenosis becomes more severe there is compression or squeezing of the spinal cord and its nerves.