Definition: protrusion of a degenerated or fragmented intervertebral disc into the intervertebral foramen with potential compression of a nerve root or into the spinal canal with potential compression of the cauda equina in the lumbar region or the spinal cord at higher levels characterized by disruption of the annular fibrosis.
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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.