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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 narrowing of the spinal canal, the bony structure that encloses the spinal cord and the nerve roots. MRI of Lumbar Spinal Stenosis Multiple level disc bulging and spinal canal narrowing has obstructed the flow of the clear white spinal fluid within the lower canal. Spinal stenosis usually develops gradually due to age-related spinal degeneration.