Antinuclear Antibody (ANA)
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This test detects antibodies to nuclear antigens. It is ordered to help screen for autoimmune disorders such as rheumatoid arthritis, scleroderma and Sjögren’s syndrome. Additionally, it is most often used as one of the tests to diagnose systemic lupus erythematosus (SLE).
Fasting is not required for this test. Take all medications as prescribed.
Although a positive ANA result may suggest an autoimmune disorder, the test can be positive in people with allergies, as well as older populations without a known disease.
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