Tests
Rheumatoid Factor (RF) Test
A rheumatoid factor (RF) test checks a sample of your blood for rheumatoid factor, a protein made by the immune system .
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Tests
A rheumatoid factor (RF) test checks a sample of your blood for rheumatoid factor, a protein made by the immune system .
Product
Tests
This test looks for CCP (cyclic citrullinated peptide) antibodies in your blood. CCP antibodies, also called anti-CCP antibodies, are a type of antibody called autoantibodies. Antibodies and autoantibodies are proteins made by the immune system :
Article
Research record from Lancet Rheumatol, 2026-08-27. PMID 42660164.
Indicators
Antibodies in the serum of individuals with rheumatoid arthritis that react with antigenic determinants or immunoglobulins that enhance agglutination of suspended particles coated with pooled human gamma-globulin. Rheumatoid factors also occur in other autoimmune and certain infectious diseases.
Tests
The determination of the rheumatoid factor antibody IgG present in a sample.
Tests
The determination of the amount of rheumatoid factor IgG autoantibody present in a sample.
Tests
The determination of the amount of rheumatoid factor IgM autoantibody present in a sample.