Which findings are most commonly associated with rheumatoid arthritis?

• A. Morning stiffness, positive rheumatoid antigen and antinuclear antibody
• B. Fever, symmetrical joint involvement, normal sedimentation rate
• C. Asymmetrical joint involvement, male gender, pain
• D. Nodular lesion on the elbow, negative sedimentation rate, positive antinuclear antibody

Answer: (A)

Rheumatoid arthritis most often presents with inflammatory, symmetric involvement of the small joints and notable morning stiffness, along with a positive rheumatoid factor. The combination of morning stiffness and RF positivity is the strongest match to the typical RA pattern, since stiffness that lasts for a substantial time in the morning reflects inflammatory synovitis, and RF positivity is commonly seen in many RA patients. Elevated inflammatory markers like ESR are also common, reinforcing the inflammatory nature of the disease. The other options either describe patterns that are atypical for RA—such as normal ESR or asymmetrical joint involvement—or introduce features more suggestive of other conditions (like ANA positivity pointing away from RA or gender patterns that don’t fit RA as well). So the presence of morning stiffness together with a positive rheumatoid factor best captures the findings most commonly associated with rheumatoid arthritis.