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  2. Rheumatoid factor - Wikipedia

    en.wikipedia.org/wiki/Rheumatoid_factor

    RF is often evaluated in patients suspected of having any form of arthritis, even though positive results can be due to other causes and negative results do not rule out disease. In combination with signs and symptoms, it can play a role in both diagnosis and disease prognosis. It is part of the usual disease criteria of rheumatoid arthritis. [6]

  3. Rheumatoid arthritis - Wikipedia

    en.wikipedia.org/wiki/Rheumatoid_arthritis

    Nodules are associated with a positive RF (rheumatoid factor) titer, ACPA, and severe erosive arthritis. Rarely, these can occur in internal organs or at diverse sites on the body. [22] Several forms of vasculitis occur in RA, but are mostly seen with long-standing and untreated disease. The most common presentation is due to involvement of ...

  4. Anti-histone antibodies - Wikipedia

    en.wikipedia.org/wiki/Anti-histone_antibodies

    Ninety-six percent of patients with lupus induced by procainamide will have a positive test for anti-histone antibodies, and 100% of patients whose lupus was induced by penicillamine, isoniazid, or methyldopa will have a positive test for anti-histone antibodies. In 70% of patients with rheumatoid arthritis, Felty's syndrome, Sjogren's syndrome ...

  5. Autoantibody - Wikipedia

    en.wikipedia.org/wiki/Autoantibody

    ANA is a marker of the autoimmune process – it is positive with a variety of different autoimmune diseases but not specific. Consequently, if an ANA test is positive, it is often followed up with other tests associated with arthritis and inflammation , such as a rheumatoid factor (RF), an erythrocyte sedimentation rate (ESR), a c-reactive ...

  6. Antinuclear antibody - Wikipedia

    en.wikipedia.org/wiki/Antinuclear_antibody

    Positive ANA as well as anti-DNA antibodies have been reported in patients with autoimmune thyroid disease. [65] [66] ANA can have a positive test result in up to 45% of people with autoimmune thyroid conditions or rheumatoid arthritis and up to 15% of people with HIV or hepatitis C.

  7. Reference ranges for blood tests - Wikipedia

    en.wikipedia.org/wiki/Reference_ranges_for_blood...

    Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the ...

  8. Mutated citrullinated vimentin - Wikipedia

    en.wikipedia.org/wiki/Mutated_citrullinated_Vimentin

    Their significance is greater than that of rheumatoid factor. Recently a serological point-of-care test (POCT) for the early detection of RA has been developed. This assay combines the detection of rheumatoid factor and anti-MCV for diagnosis of rheumatoid arthritis and shows a sensitivity of 72% and specificity of 99.7%. [4] [5]

  9. Childhood arthritis - Wikipedia

    en.wikipedia.org/wiki/Childhood_arthritis

    Rheumatoid Factor (RF) Test: [23] RF is another type of antibody, but it is more specific than ANA in that it is usually found in individuals with rheumatoid arthritis as well as other rheumatoid disease. The presence of RF in a child's blood test can be indicative for RF-positive polyarticular arthritis

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