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[10] Isthmic anterolisthesis (also called type 2) is caused by a defect in the pars interarticularis (spondylolysis) but it can also be seen with an elongated pars. [11] [12] Degenerative anterolisthesis (also called type 3) is a disease of the older adult that develops as a result of facet arthritis and joint remodeling.
Retrolisthesis can be classified as a form of spondylolisthesis, since spondylolisthesis is often defined in the literature as displacement in any direction. [1] [2] Yet, medical dictionaries usually define spondylolisthesis specifically as the forward or anterior displacement of a vertebra over the vertebra inferior to it (or the sacrum).
The vast majority of spondylolysis occur in the lumbar vertebrae, however it can also be seen in cervical vertebrae. [2] The lumbar vertebra consist of a body, pedicle , lamina , pars interarticularis , transverse process , spinous process and superior and inferior articular facets , which form joints that link the vertebrae together.
55% of facet syndrome cases occur in cervical vertebrae, and 31% in lumbar. Spinal osteoarthritis is known as spondylosis . [ 7 ] Pathology of the C1-C2 (atlantoaxial) joint, the most mobile of all vertebral segments, accounts for 4% of all spondylosis .
In cervical spondylosis, a patient may be presented with dull neck pain with neck stiffness in the initial stages of the disease. As the disease progresses, symptoms related to radiculopathy (due to compression of exiting spinal nerve by narrowed intervertebral foramen) or myelopathy (due to compression on the spinal cord) can occur. [2]
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Cervical canal stenosis may lead to myelopathy, a serious condition causing symptoms including major body weakness and paralysis. [14] Such severe spinal stenosis symptoms are virtually absent in lumbar stenosis , however, as the spinal cord terminates at the top end of the adult lumbar spine, with only nerve roots ( cauda equina ) continuing ...
Spondylitis; Spondylitis due to Tropheryma whipplei: Contrast-enhanced, T1 weighted fat suppressed magnetic resonance imaging demonstrating contrast enhancing lesions of spondylitis in the first (L1) and second (L2), as well as fourth (L4) and fifth (L5) lumbar vertebra, sparing the intervertebral discs