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Rheumatoid factor
An "rf" is a blood test used to screen a person for the possibility of several autoimmune diseases, including rheumatoid arthritis. It is important to remember that this is a screening test. A positive result only indicates more testing may be warranted, and a negative result does not rule out ra.
Osteoarthritis
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Arthritis
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Painful joints
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Fibromyalgia
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Erythema nodosum
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Meniere's disease
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Salivary gland infection
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Bronchiectasis
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Juvenile idiopathic arthritis
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Rheumatoid arthritis
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Endocarditis
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Bacterial endocarditis
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Pulmonary fibrosis
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Behcet's syndrome
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Myelofibrosis
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Glomerulonephritis
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Idiopathic pulmonary fibrosis
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Mononeuritis multiplex
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Psoriatic arthritis
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Reactive arthritis
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Polyarteritis nodosa
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Felty syndrome
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