ORTHO
BULLETS
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Review Question - QID 215437

Ankylosing Spondylitis Etiology Diagnostic criteria QID: 215437 (OBQ20.26)
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QID 215437 (Type "215437" in App Search)
A 25-year-old male was referred to the rheumatologist after being diagnosed with bilateral sacroiliitis 3 weeks ago. Laboratory workup at that time revealed a negative rheumatoid factor (RF). Which of the following additional findings is most likely present in this patient?
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