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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).
What Is Spinal Stenosis? Spinal stenosis is a condition that occurs as the spinal canal narrows, restricting or compressing the nerve roots and spinal cord. According to the American College of Rheumatology (ACR), spinal stenosis is typically caused by osteoarthritis of the spinal column.