TY - JOUR T1 - Prevalence of axial spondyloarthritis in patients with acute anterior uveitis: a cross-sectional study utilising MRI JF - RMD Open JO - RMD Open DO - 10.1136/rmdopen-2017-000553 VL - 4 IS - 1 SP - e000553 AU - Mark P Sykes AU - Louise Hamilton AU - Colin Jones AU - Karl Gaffney Y1 - 2018/02/01 UR - http://rmdopen.bmj.com/content/4/1/e000553.abstract N2 - Objective Acute anterior uveitis (AAU) is the most common extra-articular manifestation of axial spondyloarthritis (axSpA). In this study, patients presenting with AAU were evaluated clinically and with MRI in order to estimate the prevalence of axSpA.Methods Consecutive patients presenting to a university teaching hospital between February 2014 and March 2015 with AAU were invited to participate. Those with a history of chronic back pain (CBP) beginning <45 years were evaluated clinically and with MRI of thoracolumbar spine and sacroiliac joints.Results Of 366 patients with AAU, 57 had a pre-existing diagnosis of axSpA; 77 others fulfilled the study eligibility criteria and 73 (95%) completed the study. Seventeen patients (23.3%) were diagnosed with axSpA by an experienced rheumatologist; of these, eight were human leucocyte antigen-B27 negative. Including those with a previous diagnosis, this equates to a minimum axSpA prevalence of 20.2%; one-quarter of patients were previously undiagnosed.Conclusion This is the first study to actively search for the presence of axSpA in unselected patients presenting with AAU utilising MRI as an essential part of the assessment. There is a significant burden of undiagnosed axSpA in patients with AAU, but there does not appear to be a simple mechanism for screening. We recommend that ophthalmologists refer all patients with AAU with CBP, onset <45 years, to rheumatology for further evaluation. ER -