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Also known as: Antinuclear Antibody; Fluorescent Antinuclear Antibody; FANA
Formal name: Antinuclear Antibody

At a Glance

Why Get Tested?

To screen for certain autoimmune disorders, such as systemic lupus erythematosus (SLE), polymyosistis, and a number of others

When to Get Tested?

When your doctor thinks that you have symptoms of an autoimmune disorder

Sample Required?

A blood sample drawn from a vein in your arm

Test Preparation Needed?

None needed; however, some drugs interfere with the test, so tell your doctor about any medications you are taking.

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 person's immune system when it fails to adequately distinguish between "self" and "nonself." These autoantibodies attack the body's 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.

The Test

Common Questions

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Article Sources

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NOTE: This article is based on research that utilizes the sources cited here as well as the collective experience of the Lab Tests Online Editorial Review Board. This article is periodically reviewed by the Editorial Board and may be updated as a result of the review. Any new sources cited will be added to the list and distinguished from the original sources used.

Sources Used in Current Review

Borigini, M. (Updated 2009 February 3). Antinuclear antibody panel. MedlinePlus Medical Encyclopedia [On-line information]. Available online at Accessed June 2010.

Von Feldt, J. (Updated 2009 April). Antinuclear Antibodies (ANA). American College of Rheumatology [On-line information]. Available online at through Accessed June 2010.

(2009 April). Handout on Health: Systemic Lupus Erythematosus. National Institute of Arthritis and Musculoskeletal and Skin Diseases [On-line information]. Available online at through Accessed June 2010.

(Updated 2009 August). Connective Tissue Diseases. ARUP Consult [On-line information]. Available online at through Accessed June 2010.

Arthur Kavanaugh, MD, Russell Tomar, MD, John Reveille, MD, Daniel H. Solomon, MD, MPH, and Henry A. Homburger, MD. Guidelines for Clinical Use of the Antinuclear Antibody Test and Tests for Specific Autoantibodies to Nuclear Antigens. Arch Pathol Lab Med 124(1):71-81, 2000.

Jacobs DS, DeMott WR, Oxley DK, eds. Laboratory Test Handbook, 5th ed. LexiComp: Cleveland, Pp 507-509, 2001.

Sources Used in Previous Reviews

The Gale Encyclopedia of Medicine: Antinuclear antibody test. Available online at through

Kavanaugh A, Tomar R, Reveille J, Solomon DH, Homburger HA. Guidelines for clinical use of the antinuclear antibody test and tests for specific autoantibodies to nuclear antigens. Archives of Pathology and Laboratory Medicine, 2000, 124(1): 71-81.

Steven Lobel, PhD, D-ABMLI, MBA. Laboratory Director, Quest Diagnostics, Baltimore, MD.

H. James Williams, MD. Professor of Medicine, Thomas E. and Rebecca D. Jeremy Presidential Endowed Chair for Arthritis Research, University of Utah School of Medicine, Salt Lake City, UT.

Pagana, Kathleen D. & Pagana, Timothy J. (© 2007). Mosby's Diagnostic and Laboratory Test Reference 8th Edition: Mosby, Inc., Saint Louis, MO. Pp 90-92.

Thomas, Clayton L., Editor (1997). Taber's Cyclopedic Medical Dictionary. F.A. Davis Company, Philadelphia, PA [18th Edition].

Reeves, W. (2006 July). Fluorescent Antinuclear Antibody (FANA) Test: "False Positive." American College of Rheumatology [On-line information]. Available online at through Accessed on 4/9/07.

Fosam, H. (2006 April 24). The Many Faces of Lupus: An Expert Interview With Stephen Paget, MD. From Medscape Rheumatology, Expert Interview 2006;8(1) [On-line information]. Available online at through Accessed on 4/9/07.

Relchlin, M. (2005 February 3, Updated). Laboratory Tests Used in the Diagnosis of Lupus. Lupus Foundation of America [On-line information]. Available online at through

(2003 August, Revised). Systemic Lupus Erythematosus. National Institute of Arthritis and Musculoskeletal and Skin Diseases, Handout on Health [On-line information]. Available online at through Accessed on 4/15/07.

Bylund DJ, Nakamura RM: Organ-specific autoimmune diseases, in Henry's Clinical Diagnosis and Management by Laboratory Methods, 21st ed. Richard McPherson and Matthew Pincus, eds. Saunders Elsievier: Philadelphia. Pp 945-960, 2007.

Peter JB. Antinuclear antibodies, in Use and Interpretation of Laboratory Tests in Rheumatiology, James B Peter, ed. Speciality Laboratories: Los Angeles. Pp 10-11, 1998.

Smalley DL. Autoimmune diseases, in Clinical Laboratory Utilization and Consultation, BG Davis, D Mass, ML Bishop, eds. WB Saunders: Philadelphia. Pp 467-483, 1999.

Pagana, Kathleen D. & Pagana, Timothy J. (2006). Mosby's Manual of Diagnostic and Laboratory Tests 3rd Edition: Mosby Elsevier, Saint Louis, MO. Pp 91-93.

Burtis C, Ashwood E, Bruns D, eds. (2006). Tietz Textbook of Clinical Chemistry and Molecular Diagnostics, 4th edition, Saunders, Elsevier.

Arbuckle MR et al. Development of autoantibodies before the clinical onset of systemic lupus erythematosus. N Engl J Med 2003 Oct 16; 349:1526-33.

Shmerling RH. Autoantibodies in systemic lupus erythematosus -- there before you know it. N Engl J Med 2003 Oct 16; 349:1499-500.