A 55-year-old woman has morning stiffness lasting over an hour and symmetric swelling of the metacarpophalangeal joints. Which finding is most specific?
Answer and explanation
Correct answer: B. Anti-CCP antibodies
- Step 1: Anti-CCP is highly specific for rheumatoid arthritis. Answer: Anti-CCP antibodies. Why not the others: Uric acid indicates gout, HLA-B27 spondyloarthropathies and anti-dsDNA lupus.
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