Abstract
The term axial spondyloarthritis (axSpA) covers both patients who already have radiographic changes in the sacroiliac joints (radiographic sacroiliitis, ankylosing spondylitis [AS]) and patients who do not have such changes; this subgroup is now called nonradiographic axSpA (nr-axSpA).
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References
Braun J, Sieper J. Ankylosing spondylitis. Lancet. 2007;369:1379-1390.
Braun J, Bollow M, Eggens U, König H, Distler A, Sieper J. Use of dynamic magnetic resonance imaging with fast imaging in the detection of early and advanced sacroiliitis in spondylarthropathy patients. Arthritis Rheum. 1994;37:1039-1045.
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Sieper, J., Braun, J. (2014). Introduction. In: Clinician’s Manual on Axial Spondyloarthritis. Springer Healthcare, Tarporley. https://doi.org/10.1007/978-1-907673-85-6_1
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DOI: https://doi.org/10.1007/978-1-907673-85-6_1
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