Anti-smooth muscle antibody

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Types of muscle tissue

Normally, there are no antibodies present.

Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.

A positive test may be due to:

• Chronic active hepatitis
• Cirrhosis
• Infectious mononucleosis

The test also helps distinguish autoimmune hepatitis from systemic lupus erythematosus.

Review Date: 02/10/2011
Reviewed By: Michael E. Makover, MD, professor and attending in Rheumatology at the New York University Medical Center, New York, NY. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org).

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