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Spondylolysis is a defect or stress fracture in the pars interarticularis of the vertebral arch. [1] The vast majority of cases occur in the lower lumbar vertebrae (L5), but spondylolysis may also occur in the cervical vertebrae .
Microscopically visible ileal inflammation is seen in about 50% of people with spondyloarthritis and ankylosing spondylitis during ileocolonoscopy. [11] [4] There seems to be an immunological connection between the gut inflammation observed in Crohn's disease and ankylosing spondylitis. [12]
In other words, in the axial view, it is the bony mass between the facets that is anterior to the lamina and posterior to the pedicle. It is abnormal in spondylolysis, either due to fracture or congenitally. [1] Bilateral C2 pars fractures are known as a variant of the hangman's fracture.
Spondylosis is the degeneration of the vertebral column from any cause. In the more narrow sense, it refers to spinal osteoarthritis, the age-related degeneration of the spinal column, which is the most common cause of spondylosis.
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
Ankylosing spondylitis (AS) is a systemic rheumatic disease, meaning it affects the entire body. 1–2% of individuals with the HLA-B27 genotype develop the disease. [17] Tumor necrosis factor-alpha (TNF α) and interleukin 1 (IL-1) are also implicated in ankylosing spondylitis.
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Spondylosis deformans is a disease of the spine in humans and other vertebrates. It occurs when intervertebral discs begin to degenerate, leading to the formation of bony spurs or bridges around the disc and nearby spinal joints.