The Assessment of Spondyloarthritis International Society (ASAS) classification criteria are now widely accepted for the diagnosis of axSpA, which requires either (1) sacroiliitis on imaging with greater than one SpA feature (inflammatory back pain (IBP), arthritis, enthesitis, uveitis, dactylitis, psoriasis, Crohn’s disease/ulcerative colitis, a good response to non-steroidal anti-inflammatory drugs, a family history of SpA, HLA-B27 positive, or elevated CRP levels) or (2) HLA-B27 positive with greater than two SpA features [3]. Here, CRP is linked to Sacroiliac arthritis.