TY - CHAP M1 - Book, Section TI - Chapter 17. Ankylosing Spondylitis & the Arthritis of Inflammatory Bowel Disease A1 - Qubti, Marzouq Awni A1 - Flynn, John A. A2 - Imboden, John B. A2 - Hellmann, David B. A2 - Stone, John H. PY - 2013 T2 - CURRENT Diagnosis & Treatment: Rheumatology, 3e AB - The term “spondyloarthritis” is used to describe an overlapping group of diseases that are characterized by inflammation of the sacroiliac joints (sacroiliitis); axial spine (spondylitis); tendon, fascia, and ligament insertion sites (enthesitis); and, in some patients, an oligoarthritis, rash, or inflammatory eye disease (uveitis). This group of diseases has also been referred to as seronegative spondyloarthritis based on the absence of rheumatoid factor. These diseases include ankylosing spondylitis, psoriatic arthritis, the arthritis of inflammatory bowel disease, and reactive arthritis. Although these conditions share common features, each one has distinct clinical and epidemiologic characteristics (Table 17–1). However, in some patients, especially early in the disease presentation, the diagnosis is not clear; these patients are considered to have undifferentiated spondyloarthritis. The overall prevalence of these conditions has been estimated to be between 0.5% and 1.5%. SN - PB - The McGraw-Hill Companies CY - New York, NY Y2 - 2024/04/19 UR - accessmedicine.mhmedical.com/content.aspx?aid=57271942 ER -