RT Book, Section A1 Chumley, Heidi S. A2 Usatine, Richard P. A2 Smith, Mindy A. A2 Mayeaux, Jr., E.J. A2 Chumley, Heidi S. SR Print(0) ID 1164352169 T1 Ankylosing Spondylitis T2 The Color Atlas and Synopsis of Family Medicine, 3e YR 2019 FD 2019 PB McGraw-Hill Education PP New York, NY SN 9781259862045 LK accessmedicine.mhmedical.com/content.aspx?aid=1164352169 RD 2024/03/28 AB A 43-year-old man falls and presents with acute back and diffuse abdominal pain. He has had back pain on and off for at over 5 years. Also, his wife notes that he has become "stooped" forward in the last few years. The radiographs show flowing ligamentous ossification and syndesmophyte formation about the cervical, thoracic, and lumbar spine consistent with ankylosing spondylitis (bamboo spine) (Figure 100-1). The KUB (kidneys, ureters, bladder) view film also shows fusion of the sacroiliac joints consistent with ankylosing spondylitis (Figure 100-2). No fracture, dislocation, or abdominal pathology is identified. The patient's symptoms are treated and nonsteroidal anti-inflammatory drugs (NSAIDs) are started. On follow-up a blood test reveals that he is human leukocyte antigen (HLA)-B27–positive.