How is spondyloarthropathy (SpA) classified?

Updated: Jul 17, 2018
  • Author: Lawrence H Brent, MD; Chief Editor: Herbert S Diamond, MD  more...
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Answer

The Assessment of SpondyloArthritis International Society (ASAS) has developed criteria for the classification of axial and peripheral SpA. These criteria incorporate the emerging concept of nonradiographic axial SpA, which refers to patients who have signs and symptoms of axial disease but lack the radiographic damage to the sacroiliac joints needed to meet the modified New York criteria. [80] Some, but not all, of these cases will progress to AS over time.


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