Which conditions should be included in the differential diagnoses for ankylosing spondylitis (AS) and undifferentiated spondyloarthropathy (USpA)?

Updated: Feb 02, 2021
  • Author: Lawrence H Brent, MD; Chief Editor: Herbert S Diamond, MD  more...
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In addition to the conditions listed in the differential diagnosis, the following problems should be considered:

  • Inflammatory bowel disease (IBD)–associated spondyloarthropathy (SpA)

  • Juvenile idiopathic arthritis

  • Diffuse idiopathic skeletal hyperostosis

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