Akkoc N, Khan MA. Epidemiology of axial spondyloarthritis. In: Mease P, Khan MA, editors. Axial Spondyloarthritis. 1st ed. St. Louis, MO: Elsevier; 2020. p. 31–56.

Google Scholar 

Calin A, Porta J, Fries JF, Schurman DJ. Clinical history as a screening test for ankylosing spondylitis. JAMA. 1977;237(24):2613–4.

Article  Google Scholar 

Rudwaleit M, Metter A, Listing J, Sieper J, Braun J. Inflammatory back pain in ankylosing spondylitis: a reassessment of the clinical history for application as classification and diagnostic criteria. Arthritis Rheum. 2006;54(2):569–78.

Article  Google Scholar 

Rudwaleit M, van der Heijde D, Landewe R, Listing J, Akkoc N, Brandt J, 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.

Article  Google Scholar 

Poddubnyy D, Callhoff J, Spiller I, Listing J, Braun J, Sieper J, et al. Diagnostic accuracy of inflammatory back pain for axial spondyloarthritis in rheumatological care. RMD Open. 2018;4(2):e000825.

Article  Google Scholar 

Sieper J, Rudwaleit M. Early referral recommendations for ankylosing spondylitis (including pre-radiographic and radiographic forms) in primary care. Ann Rheum Dis. 2005;64(5):659–63.

Article  Google Scholar 

de Hooge M, van Gaalen FA, Renson T, De Craemer AS, van de Sande MG, Ramonda R, et al. Low specificity but high sensitivity of inflammatory back pain criteria in rheumatology settings in Europe: confirmation of findings from a German cohort study. Ann Rheum Dis. 2019;78(11):1605–6.

Article  Google Scholar 

Braun A, Saracbasi E, Grifka J, Schnitker J, Braun J. Identifying patients with axial spondyloarthritis in primary care: how useful are items indicative of inflammatory back pain? Ann Rheum Dis. 2011;70(10):1782–7.

Article  Google Scholar 

van der Linden SM, Khan MA, Li Z, Baumberger H, Zandwijk HV, Khan K, et al. Factors predicting axial spondyloarthritis among first-degree relatives of probands with ankylosing spondylitis: a family study spanning 35 years. Ann Rheum Dis. 2022;81(6):831–7.

Article  Google Scholar 

Khan MA, Khan MK. Diagnostic value of HLA-B27 testing ankylosing spondylitis and Reiter’s syndrome. Ann Intern Med. 1982;96(1):70–6.

Article  Google Scholar 

Akkoc N, Khan MA. Overestimation of the prevalence of ankylosing spondylitis in the Berlin study: comment on the article by Braun et al. Arthritis Rheum. 2005;52(12):4048–9; author reply 4049–50. https://doi.org/10.1002/art.21492.

Braun J, Bollow M, Remlinger G, Eggens U, Rudwaleit M, Distler A, et al. Prevalence of spondylarthropathies in HLA-B27 positive and negative blood donors. Arthritis Rheum. 1998;41(1):58–67.

Article  Google Scholar 

Reveille JD, Weisman MH. The epidemiology of back pain, axial spondyloarthritis and HLA-B27 in the United States. Am J Med Sci. 2013;345(6):431–6.

Article  Google Scholar 

Weber U, Jurik AG, Lambert RGW, Maksymowych WP. Imaging in axial spondyloarthritis: what is relevant for diagnosis in daily practice? Curr Rheumatol Rep. 2021;23(8):66.

Article  Google Scholar 

Mau W, Zeidler H, Mau R, Majewski A, Freyschmidt J, Stangel W, et al. Clinical features and prognosis of patients with possible ankylosing spondylitis. Results of a 10-year followup. J Rheumatol. 1988;15(7):1109–14.

Google Scholar 

Maksymowych WP. Ankylosing spondylitis. Not just another pain in the back. Can Fam Physician. 2004;50:257–62.

Google Scholar 

Baraliakos X, Richter A, Feldmann D, Ott A, Buelow R, Schmidt CO, et al. Which factors are associated with bone marrow oedema suspicious of axial spondyloarthritis as detected by MRI in the sacroiliac joints and the spine in the general population? Ann Rheum Dis. 2021;80(4):469–74.

Article  Google Scholar 

Arnbak B, Jensen TS, Egund N, Zejden A, Horslev-Petersen K, Manniche C, et al. Prevalence of degenerative and spondyloarthritis-related magnetic resonance imaging findings in the spine and sacroiliac joints in patients with persistent low back pain. Eur Radiol. 2016;26(4):1191–203.

Article  Google Scholar 

• Weber U, Jurik AG, Zejden A, Larsen E, Jorgensen SH, Rufibach K, et al. MRI of the sacroiliac joints in athletes: recognition of non-specific bone marrow oedema by semi-axial added to standard semi-coronal scans. Rheumatology (Oxford). 2020;59(6):1381–90. This article highlights the presence of non-specific bone marrow edema in sacroiliac joints of atheltes.

Article  Google Scholar 

Varkas G, de Hooge M, Renson T, De Mits S, Carron P, Jacques P, et al. Effect of mechanical stress on magnetic resonance imaging of the sacroiliac joints: assessment of military recruits by magnetic resonance imaging study. Rheumatology (Oxford). 2018;57(3):508–13.

Article  Google Scholar 

de Winter J, de Hooge M, van de Sande M, de Jong H, van Hoeven L, de Koning A, et al. Magnetic resonance imaging of the sacroiliac joints indicating sacroiliitis according to the assessment of SpondyloArthritis international Society definition in healthy individuals, runners, and women with postpartum back pain. Arthritis Rheumatol. 2018;70(7):1042–8.

Article  Google Scholar 

Weber U, Lambert RG, Ostergaard M, Hodler J, Pedersen SJ, Maksymowych WP. The diagnostic utility of magnetic resonance imaging in spondylarthritis: an international multicenter evaluation of one hundred eighty-seven subjects. Arthritis Rheum. 2010;62(10):3048–58.

Article  Google Scholar 

• Maksymowych WP, Lambert RG, Baraliakos X, Weber U, Machado PM, Pedersen SJ, et al. Data-driven definitions for active and structural MRI lesions in the sacroiliac joint in spondyloarthritis and their predictive utility. Rheumatology (Oxford). 2021;60(10):4778–89. This article highlights the most recent proposed definitions of axSpA MRI lesions by the ASAS-MRI group.

Article  Google Scholar 

Baraliakos X, Kuehn A, Tsiami S, Kiltz U, Fruth M, Braun J. The influence of age on the prevalence of inflammatory and structural MRI lesions in the SIJ of patients with and without axSpA. Rheumatology (Oxford). 2022:keac505. https://doi.org/10.1093/rheumatology/keac505.

Diekhoff T, Lambert R, Hermann KG. MRI in axial spondyloarthritis: understanding an “ASAS-positive MRI” and the ASAS classification criteria. Skeletal Radiol. 2022;51(9):1721–30.

Article  Google Scholar 

Diekhoff T, Eshed I, Radny F, Ziegeler K, Proft F, Greese J, et al. Choose wisely: imaging for diagnosis of axial spondyloarthritis. Ann Rheum Dis. 2022;81(2):237–42.

Article  Google Scholar 

Wu H, Zhang G, Shi L, Li X, Chen M, Huang X, et al. Axial spondyloarthritis: dual-energy virtual noncalcium ct in the detection of bone marrow edema in the sacroiliac joints. Radiology. 2019;290(1):157–64.

Article  Google Scholar 

Rich-Garg N, Danve A, Choi D, Vakil-Gilani K, Akkoc N, Azevedo V, et al. Assessing rheumatologists’ attitudes and utilization of classification criteria for ankylosing spondylitis and axial spondyloarthritis: a global effort. Clin Rheumatol. 2021;40(3):949–54.

Article  Google Scholar 

Kiil RM, Mistegaard CE, Jurik AG, Christiansen AA, Hendricks O, Schiottz-Christensen B, et al. Diagnosing axial spondyloarthritis by multidiciplinary team conference at 3.5 years’ follow-up in a cohort of patients with disease features according to the ASAS criteria. Scand J Rheumatol. 2022;51(4):291–9.

Article  Google Scholar 

Ez-Zaitouni Z, Bakker PAC, van Lunteren M, Berg IJ, Landewe R, van Oosterhout M, et al. Presence of multiple spondyloarthritis (SpA) features is important but not sufficient for a diagnosis of axial spondyloarthritis: data from the SPondyloArthritis Caught Early (SPACE) cohort. Ann Rheum Dis. 2017;76(6):1086–92.

Article  Google Scholar 

Proft F, Poddubnyy D. Ankylosing spondylitis and axial spondyloarthritis: recent insights and impact of new classification criteria. Ther Adv Musculoskelet Dis. 2018;10(5–6):129–39.

Article  Google Scholar 

Weisman MH, Witter JP, Reveille JD. The prevalence of inflammatory back pain: population-based estimates from the US National Health and Nutrition Examination Survey, 2009–10. Ann Rheum Dis. 2013;72(3):369–73.

Article  Google Scholar 

Mader R, Verlaan JJ, Eshed I, Bruges-Armas J, Puttini PS, Atzeni F, et al. Diffuse idiopathic skeletal hyperostosis (DISH): where we are now and where to go next. RMD Open. 2017;3(1):e000472.

Article  Google Scholar 

Olivieri I, D’Angelo S, Palazzi C, Padula A, Mader R, Khan MA. Diffuse idiopathic skeletal hyperostosis: differentiation from ankylosing spondylitis. Curr Rheumatol Rep. 2009;11(5):321–8.

Article  Google Scholar 

Kuperus JS, de Gendt EEA, Oner FC, de Jong PA, Buckens S, van der Merwe AE, et al. Classification criteria for diffuse idiopathic skeletal hyperostosis: a lack of consensus. Rheumatology (Oxford). 2017;56(7):1123–34.

Article  Google Scholar 

Mader R, Pappone N, Baraliakos X, Eshed I, Sarzi-Puttini P, Atzeni F, et al. Diffuse idiopathic skeletal hyperostosis (DISH) and a possible inflammatory component. Curr Rheumatol Rep. 2021;23(1):6.

Article  Google Scholar 

Yagan R, Khan MA, Bellon EM. Spondylitis and posterior longitudinal ligament ossification in the cervical spine. Arthritis Rheum. 1983;26(2):226–30.

Article  Google Scholar 

Osteitis MR, Ilii C. Rheumatol Int. 2010;30(3):293–6.

Article  Google Scholar 

Ma L, Gao Z, Zhong Y, Meng Q. Osteitis condensans ilii may demonstrate bone marrow edema on sacroiliac joint magnetic resonance imaging. Int J Rheum Dis. 2018;21(1):299–307.

Article  Google Scholar 

• Renson T, Depicker A, De Craemer AS, Deroo L, Varkas G, de Hooge M, et al. High prevalence of spondyloarthritis-like MRI lesions in postpartum women: a prospective analysis in relation to maternal, child and birth characteristics. Ann Rheum Dis. 2020;79(7):929–34. This study describes the prevalence of bone marrow edema in postpartum women and how it can mimic axial spondyloarthritis.

Article  Google Scholar 

Magrey MN, Antonelli M, James N, Khan MA. High frequency of fibromyalgia in patients with psoriatic arthritis: a pilot study. Arthritis. 2013;2013:762921.

Article  Google Scholar 

Renson T, de Hooge M, De Craemer AS, Deroo L, Lukasik Z, Carron P, et al. Progressive increase in sacroiliac joint and spinal lesions detected on magnetic resonance imaging in healthy individuals in relation to age. Arthritis Rheumatol. 2022;74(9):1506–14.

Article  Google Scholar 

Ziegeler K, Hermann KGA, Diekhoff T. Anatomical joint form variation in sacroiliac joint disease: current concepts and new perspectives. Curr Rheumatol Rep. 2021;23(8):60.

Article  Google Scholar 

Khan MA, Kushner I, Freehafer AA. Sacroiliac joint abnormalities in paraplegics. Ann Rheum Dis. 1979;38(4):317–9.

Article  Google Scholar 

Srinivasalu H, Treemarcki EB, Redmond C. Advances in juvenile spondyloarthritis. Curr Rheumatol Rep. 2021;23(9):70.

Article  Google Scholar 

Hollingworth P. Back pain in children. Br J Rheumatol. 1996;35(10):1022–8.

Article  Google Scholar 

Tsoi C, Griffith JF, Lee RKL, Wong PCH, Tam LS. Imaging of sacroiliitis: current status, limitations and pitfalls. Quant Imaging Med Surg. 2019;9(2):318–35.

Article  Google Scholar 

Ziegeler K, Eshed I, Diekhoff T, Hermann KG. Imaging of joints and bones in autoinflammation. J Clin Med. 2020;9(12):4074. https://doi.org/10.3390/jcm9124074.

Bakland G, Gran JT, Nossent JC. Increased mortality in ankylosing spondylitis is related to disease activity. Ann Rheum Dis. 2011;70(11):1921–5.

Article  Google Scholar 

Antonelli MJ, Magrey M. Sacroiliitis mimics: a case report and review of the literature. BMC Musculoskelet Disord. 2017;18(1):170.

Article  Google Scholar 

Francois S, Guaydier-Souquieres G, Marcelli C. Acute sacroiliitis as a manifestation of calcium pyrophosphate dihydrate crystal deposition disease A report of two cases. Rev Rhum Engl Ed. 1997;64(7–9):508–12.