TY - CHAP M1 - Book, Section TI - Ankylosing Spondylitis A1 - Yazdany, Jinoos A1 - Manno, Rebecca L. A2 - Papadakis, Maxine A. A2 - McPhee, Stephen J. A2 - Rabow, Michael W. A2 - McQuaid, Kenneth R. PY - 2022 T2 - Current Medical Diagnosis & Treatment 2022 AB - ESSENTIALS OF DIAGNOSISChronic low backache and stiffness in young adults, worst in the morning.Progressive limitation of back motion and chest expansion.Transient (50%) or persistent (25%) peripheral arthritis.Anterior uveitis in 20–25%.Diagnostic radiographic changes in sacroiliac joints.Negative serologic tests for rheumatoid factor and anti-CCP antibodies.HLA-B27 testing is most helpful when there is an intermediate probability of disease. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/29 UR - accessmedicine.mhmedical.com/content.aspx?aid=1184193464 ER -