A 30-year-old woman complains of bilateral pain and stiffness in the small joints of her hands, worse in the morning and improving throughout the day. What is the most likely diagnosis?
APsoriatic arthritis
BOsteoarthritis
CRheumatoid arthritis
DGout
Which one of the following is not a diagnostic criterion for rheumatoid arthritis according to the American Rheumatism Association?
ARaised rheumatoid factor.
BSymmetrical muscle weakness.
CSymmetric swelling (arthritis) for at least 6 weeks.
DRheumatoid nodules.
A 50-year-old woman with a history of rheumatoid arthritis presents with fever and joint pain. Which laboratory test is most definitive in distinguishing between a rheumatoid flare and an infectious process?
AErythrocyte sedimentation rate (ESR)
BJoint aspiration and culture
CC-reactive protein (CRP)
DRheumatoid factor (RF)
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