Source: Rudwaleit M, van der Heijde D, Landewé R et al. The development of Assessment of SpondyloArthritis international Society classification criteria for axial spondyloarthritis (part II): validation and final selection. Ann Rheum Dis 2009;68(6):777-83. [PubMed] | |
Sacroiliitis (on MRI or plain x-rays) + HASH(0x2f82cc8) 1 SpA feature or HLA-B27 + HASH(0x2f82cc8) 2 other SpA features | SpA features
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