Herniated Disc
A spinal disc herniation (prolapsus disci intervertebralis), informally called a "slipped disc", is a medical condition affecting the spine, in which a tear in the outer, fibrous ring (annulus fibrosus) of an intervertebral disc (discus intervertebralis) allows the soft, central portion (nucleus pulposus) to bulge out. Tears are frequently posterior-ipsilateral in nature owing to the presence of the posterior longitudinal ligament in the spinal canal. It is normally a further development of a previously existing disc protrusion.
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