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Lumbar disc protrusion occurs when the nucleus pulposus (the soft, gelatinous core) of an intervertebral disc bulges outward through a weakened or torn annulus fibrosus (the...
A lumbar disc protrusion at L4–L5 occurs when the central gel-like nucleus of the intervertebral disc bulges outward through a weakened outer ring (annulus fibrosis), pressing...
Lumbar disc protrusion at the L5–S1 level occurs when the inner gel-like nucleus pulposus pushes outward against the outer fibrous annulus fibrosus of the intervertebral disc...
A lumbar disc protrusion at the L1–L2 level occurs when the outer fibers of the annulus fibrosus of the intervertebral disc between the first and second...
Lumbar disc proximal extraforaminal bulging is a specific form of intervertebral disc displacement in which the outer annulus fibrosus of the disc between two lumbar vertebrae...
A lumbar disc proximal extraforaminal bulge (also called a “far-lateral bulging disc”) occurs when the annulus fibrosus of an intervertebral disc in the lower back (lumbar...
Proximal extraforaminal displacement of a lumbar intervertebral disc refers to the focal displacement of nucleus pulposus material beyond its normal confines, occurring lateral to the neural...
A lumbar disc proximal extraforaminal extrusion is a specific form of lumbar intervertebral disc herniation in which the nucleus pulposus (the soft, gel-like center of the...
Extraforaminal (far‐lateral) lumbar disc herniation—specifically the proximal extraforaminal subtype—occurs when nucleus pulposus material breaches the lateral border of the intervertebral foramen and migrates into the space...
A disc protrusion is a type of intervertebral disc herniation in which the nucleus pulposus bulges outward but the annulus fibrosus remains intact. Protrusions that occur...
A normal lumbar disc is a rubber-like cushion between two vertebral bodies. In a typical herniation, some nucleus pulposus pushes backward into the spinal canal. In...
Lumbar disc retrolisthesis is a specific form of spondylolisthesis in which one vertebral body in the lower (lumbar) spine slips backward relative to the vertebra immediately...
