A rheumatoid factor (RF) test detects rheumatoid factor, a type of antibody (proteins that fight off harmful substances) in your blood. RF antibodies sometimes attack healthy cells and tissues, ...

Q: Can you tell me the name of the blood test that would tell me if I have rheumatoid arthritis? A: Actually, there is no blood test that’ll tell you if you have rheumatoid arthritis — an inflammatory ...

When persistent joint pain strikes, the search for answers often leads to a crucial diagnostic tool: the rheumatoid factor test. This relatively quick blood analysis serves as a window into the immune ...

People who develop rheumatoid arthritis experience changes to their immune systems long before their joints become swollen and painful, suggesting that early treatment might stop or limit damage, a ...