Stenosis

Stenosis refers to a narrowing of the spinal canal, with resulting pressure on the spinal cord and nerve roots. The narrowing may be caused by a protruding disc, or by the growth of extra bone, called hard stenosis. As a healthy disc degenerates due to improper resting posture, the vertebrae above and below produce additional bone tissue to help support the weight no longer supported by the disc. Surgery is often performed to remove the extra bone.