Diagnostic tests

Antinuclear antibody (ANA) blood test

An ANA blood test, also known as an antinuclear antibody test, is a blood test that is used to detect the presence of antinuclear antibodies (ANAs) in a person's blood. ANAs are antibodies that are produced by the immune system and can attack the body's own cells and tissues. The presence of ANAs in the blood can be a sign of a number of different autoimmune disorders, including lupus and rheumatoid arthritis. An ANA blood test is often ordered as part of a routine medical examination or when a person is experiencing certain symptoms, such as fatigue or joint pain.

This page is provided for educational and informational purposes only and does not constitute the provision of medical advice or professional services. The information provided should not be used for diagnosing or treating a health problem or disease, and those seeking personal medical advice regarding any of the tests and conditions referenced above are advised to consult with a licensed clinician. Always seek the advice of your qualified health provider regarding a medical condition and do not disregard professional medical advice or delay in seeking it because of any information on this page. If you think you may have a medical emergency, immediately call 911 or go to the nearest urgent care center or hospital.

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