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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] With AS, eye and bowel problems—as well as back pain—may occur. [2]
Testing for the human leukocyte antigen (HLA) can be the most beneficial laboratory investigation. Since only 5% of those with HLA-B27 in the general population will develop ankylosing spondylitis , the correlation between HLA-B27 and the prevalence of spondyloarthritis is weak.
More than 80% of patients with the ankylosing spondylitis variant test positive for the HLA-B27 biomarker, but not everyone with this biomarker will develop disease. [22] Some people with axial spondyloarthritis may test positive for elevated C-reactive protein, or CRP, depending on their disease activity. [22]
The BASDAI or Bath Ankylosing Spondylitis Disease Activity Index is a validated diagnostic test which allows a physician, usually a rheumatologist, to determine the effectiveness of a current drug therapy, or the need to institute a new drug therapy for the treatment of Ankylosing spondylitis (AS).
When involving inflammation, it can be called spondylitis. In contrast, a spondyloarthropathy is a condition involving the vertebral joints, but many conditions involve both spondylopathy and spondyloarthropathy. Examples include ankylosing spondylitis and spondylosis.
Schober's test is a physical examination used in family medicine, physical medicine and rehabilitation, rheumatology to measure the ability of a patient to flex the lower back. Procedure [ edit ]
The Bath Ankylosing Spondylitis Functional Index was named for the location of the institution (Bath, England) where authors A. Calin and co-workers developed this validated index to determine the degree of functional limitation in patients with the inflammatory autoimmune disease Ankylosing Spondylitis (AS). These researchers recognized that ...
Immunofluorescence pattern of SS-A and SS-B antibodies. Produced using serum from a patient on HEp-20-10 cells with a FITC conjugate. Anti-SSA autoantibodies (anti–Sjögren's-syndrome-related antigen A autoantibodies, also called anti-Ro, or similar names including anti-SSA/Ro, anti-Ro/SSA, anti–SS-A/Ro, and anti-Ro/SS-A) are a type of anti-nuclear autoantibodies that are associated with ...