Resumo
Spondyloarthritis (SpA) is inflammatory arthritis that affects the spine and peripheral skeleton; this term groups the ankylosing spondylitis (AS), psoriatic arthritis (PsA), arthritis/spondylitis with inflammatory bowel disease (IBD), reactive arthritis (ReA), acute anterior uveitis (AAU), juvenile idiopathic arthritis (JIA), and undifferentiated spondyloarthropathy (uSpA).