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►👨🏫💊Antibiotics Lectures: [ Ссылка ] ... Check out my brand new "Electrolytes" course at [ Ссылка ] and use the PROMO code: ELECTROLYTES50 to get a 50% discount. Rheumatoid factor (RF) is an IgM autoantibody against the Fc portion of IgG. "an antibody against an antibody".
Rheumatoid factor (RF) is present in 80% of patients with rheumatoid arthritis (RA), which makes this test 80% sensitive.
Rheumatoid factor (RF) is not specific, because it can be seropositive in many diseases including rheumatoid arthritis (RA), systemic lupus erythematosus (SLE), sjögren syndrome, interstitial pulmonary fibrosis, hepatitis B infection, essential mixed cryoglobulinemia, infective endocarditis (subacute bacterial endocarditis or SABE), tuberculosis, infectious mononucleosis (mono) and hematological malignancies...This, by definition, is non-specific.
Anti-neutrophilic cytoplasmic antibodies (ANCA) are IgG autoantibodies against the cytoplasm of the neutrophils and monocytes.
This is different from antinuclear antibodies (ANA) which are antibodies against the nucleus.
Anti-neutrophilic cytoplasmic antibodies (ANCA) have several patterns; the most important two being the cytoplasmic ANCA (c-ANCA) and the perinuclear ANCA (p-ANCA).
Anti-neutrophilic cytoplasmic antibodies (ANCA) are associated with vasculitis, such as granulomatosis with polyangiitis (Wegener granulomatosis), microscopic polyangiitis, eosinophilic granulomatosis with polyangiitis (Churg-Strauss), rapidly-progressive glomerulonephritis (RPGN), anti-glomerular basement membrane antibodies (ant-GBM or Goodpasture's syndrome), as well as inflammatory bowel disease-associated. vasculitis.
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To sum up, rheumatoid factor (RF) is an IgM antibody against IgG, associated with rheumatoid arthritis, SLE, and others. If you like my videos, please consider leaving a tip at [ Ссылка ]
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