The classification of spondyloarthritides

: Spondyloarthritides (SpA) are a heterogeneous group of HLA-B27 associated musculoskeletal diseases that affect the axial and peripheral skeleton and most of them have some extraskeletal manifestations. The last classification criteria for SpA that has developed ASAS (Assessment of SpondyloArthritis International Society) working group have been published recently. The new criteria include the typical clinical and laboratory characteristics of all entities from the spectrum of SpA, which enables early diagnosis and planning of treatment strategies.