Ankylosing Spondylitis, Rheumatologic Perspective (cont.)
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Medically Reviewed by a Doctor on 12/23/2014
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The spondyloarthropathies (SpAs) are a family of related disorders that includes ankylosing spondylitis (AS), reactive arthritis (ReA; also known as Reiter syndrome [RS]), psoriatic arthritis (PsA), spondyloarthropathy associated with inflammatory bowel disease (IBD), undifferentiated spondyloarthropathy (USpA), and, possibly, Whipple disease and Behçet disease.