| For Practicing Rheumatologists |
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Article Summary
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Poddubnyy DA et al. - Ankylosing spondylitis (AS) is a chronic systemic inflammatory rheumatic disorder of unknown aetiology that primarily affects the axial skeleton (sacroiliac joints and spine). AS belongs to a group of related diseases termed spondyloarthritides (SpAs), which also comprises conditions such as reactive arthritis and arthritis/spondylitis associated with inflammatory bowel disease or with psoriasis. Diagnosis of AS according to the modified New York criteria (see Box 1) requires the presence of unequivocal radiographic sacroiliitis (at least grade 2 bilaterally or grade 3 unilaterally).
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