What is the antinuclear antibodies test?
The antinuclear antibodies (ANA) test is done to check your immune
system. It measures whether your body's immune system has made
antibodies that are attacking your body's own cells.
Another name for this blood test is FANA (fluorescent antinuclear
antibodies) screen.
Why is this test done?
This test can help confirm a diagnosis when you have symptoms of
an autoimmune disease. It is done to help diagnose systemic lupus
erythematosus (SLE, or lupus), as well as lupus that is caused by
drugs. Lupus is one of several diseases that may cause arthritis
(joint inflammation). This test may also be done to see how well
treatment for lupus is working.
How do I prepare for this test?
No special preparation is needed for this test.
How is the test done?
A small amount of blood is taken from your arm with a needle. The
blood is collected in tubes and sent to a lab.
Having this test will take just a few minutes of your time. There
is no risk of getting AIDS, hepatitis, or any other blood-borne
disease from this test.
How will I get the test result?
Ask your heath care provider when and how you will get the result
of your test.
What does the test result mean?
The result of this test alone is not very helpful. If your test
result is positive, you may have an autoimmune disease such as
lupus. However, many people who do not have an autoimmune disease
have a positive test result because they normally have a small
amount of antinuclear antibodies in their blood. It is also
possible to have a negative result even though you do have an
autoimmune disease. To make a diagnosis, your healthcare provider
usually needs to interpret ANA test results with your symptoms,
your exam, and other lab tests.
What if my test result is not normal?
Test results are only one part of a larger picture that takes into
account your medical history and current health. Sometimes a test
needs to be repeated to check the first result. Talk to your
healthcare provider about your result and ask questions.
If your test result is abnormal, ask your healthcare provider:
- if you need more tests
- when you need to be tested again.
This content is reviewed periodically and is subject to
change as new health information becomes available. The
information is intended to inform and educate and is not a
replacement for medical evaluation, advice, diagnosis or
treatment by a healthcare professional.
© 2009 RelayHealth and/or its affiliates. All Rights Reserved.
This
information is approved and/or reviewed by U-M Health System providers
but it is not a tool for self-diagnosis or a substitute for medical
treatment. You should speak to your physician or make
an appointment to be seen if you have questions or concerns about
this information or your medical condition.