ANA
Also known as: Antinuclear Antibody test; Fluorescent Antinuclear Antibody; FANA; Extractable Nuclear Antigen Antibodies; ENA
Formal name: Antinuclear Antibody Test
Related tests: Autoantibody tests
The Test Sample
What is being tested?
The ANA test identifies the presence of antinuclear antibodies (ANA) in the blood. ANA is a group of special antibodies produced by a patients immune system when it fails to adequately distinguish between self and nonself." These autoantibodies attack the bodys own cells, causing signs and symptoms such as tissue and organ inflammation, joint and muscle pain, and fatigue. The presence of ANA is a marker of an autoimmune process and is associated with several autoimmune disorders but is most commonly seen in the autoimmune disorder systemic lupus erythematosus (SLE).
How is the sample collected for testing?
A blood sample is taken by needle from a vein in the arm.
NOTE: If undergoing medical tests makes you or someone you care for anxious, embarrassed, or even difficult to manage, you might consider reading one or more of the following articles: Coping with Test Pain, Discomfort, and Anxiety, Tips on Blood Testing, Tips to Help Children through Their Medical Tests, and Tips to Help the Elderly through Their Medical Tests.
Another article, Follow That Sample, provides a glimpse at the collection and processing of a blood sample and throat culture.
Is any test preparation needed to ensure the quality of the sample?
No test preparation is needed; however, some drugs interfere with the test, so tell your doctor about any medications you are taking.
