An ANA test is a blood test that looks for antinuclear antibodies, which attack healthy cells. It’s normal to have a few antinuclear antibodies in your blood. But too many may indicate an autoimmune disorder, such as systemic lupus erythematosus (SLE), rheumatoid arthritis, scleroderma, Addison disease, or autoimmune hepatitis.
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Overview:
An ANA test is a blood test that looks for antinuclear antibodies, which attack healthy cells. It's normal to have a few antinuclear antibodies in your blood. But too many may indicate an autoimmune disorder, such as systemic lupus erythematosus (SLE), rheumatoid arthritis, scleroderma, Addison disease, or autoimmune hepatitis.