Autoimmune: ANA test detects antinuclear antibodies in your blood. Your immune system normally makes antibodies to help you fight infection.Antinuclear antibodies often attack your body's own tissues, each cell's nucleus. Positive ANA test indicates that your immune system is misdirected attacking your own cells. Some people have positive ANA tests even when they're healthy. Ordered if lupus ra, scleroderma.
Answered 11/28/2017
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