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Ankylosing spondylitis (AS) is a type of arthritis from the disease spectrum of axial spondyloarthritis. [5] It is characterized by long-term inflammation of the joints of the spine, typically where the spine joins the pelvis. [2]
Ankylosing spondylitis is a genetic disease with identifiable marks, tends to start showing signs in adolescence or young adulthood, is more likely to affect the lumbar spine, and affects organs. DISH has no indication of a genetic link, is primarily thoracic and does not affect organs other than the lungs, and only indirectly due to the fusion ...
Spinal abnormalities such as flattening of the lumbar lordosis, exaggeration of the thoracic kyphosis, and hyperextension of the cervical spine lead to limited spinal motion. Hip and shoulder arthritis can occur in some people with ankylosing spondylitis , usually early in the course of the illness.
Ankylosing spondylitis is a type of arthritis in which there is long-term inflammation of the joints of the spine. [2] Other forms of arthritis may sometimes also lead to ankylosis, including rheumatoid arthritis and reactive arthritis; Osteoarthritis usually confers osteophyte formation, which may eventually fuse across joints. Osteoarthritis ...
Dural ectasia is defined as a ballooning or outpouching of the dura with a dural volume greater than two standard deviations above the mean value in controls. [9] It is usually identified by MRI or CT Scan, [7] which can be used to distinguish it from tumors. [16]
The spinal canal may become narrowed due to abscesses, granulation tissue, or direct dural invasion resulting in compression of cord and neurological deficits. [3] Kyphosis is a result of the front of the spine collapsing. Injury to the thoracic spine are more likely to result in kyphosis compared to lumbar spine injuries. [3]
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]
In 1984, a joint effort led to the definition of specific classification criteria for ankylosing spondylitis, called the "Modified New York criteria". [31] One of the central New York criteria was the existence of radiographically visible changes in the sacroiliac joints and/or spine , which have formed due to bone fusion, erosion and/or ...