Even healthy individuals occasionally test positive—about 4% of the general population has elevated rheumatoid factor without any disease symptoms. This percentage increases with age, reaching ...

RA primarily affects the joints, but it can also cause symptoms in other areas of the body, such as the skin. Learn how RA ...

The results showed, moreover, that in rheumatoid patients in whom all three tests were positive, rheumatoid factor was different and separable from the factors that produced L.E. cells and nuclear ...

A positive result means you have a higher-than-normal level of rheumatoid factor in your blood. It may be a sign of rheumatoid arthritis , other autoimmune diseases, or an underlying infection.

Rheumatoid factor (RF) is a type of antibody, an immune system protein that helps the body fight foreign substances like bacteria and viruses, called antigens. Antibodies, also known as ...

Rheumatoid arthritis (RA) is classified as seropositive or seronegative based on the presence of specific antibodies in the blood, which can influence the severity of symptoms and treatment ...

A 35-year-old man presents with a chief complaint of purple discoloration of his toes and associated skin lesions that have ...

Positive latex tests for rheumatoid factor were found in approximately two thirds of the patients. For several reasons this occurrence is of particular interest.

If you have moderate stage RA, you are more likely to have blood tests that are positive for rheumatoid factor or anti-CCP. Imaging tests may also show early signs of joint damage, ...

Source Reference: Lönnblom E, et al "Autoantibodies to disease-related proteins in joints as novel biomarkers for the diagnosis of rheumatoid arthritis" Arthritis Rheumatol 2023; DOI: 10.1002/art ...