Smooth Muscle Antibody

Also known as: SMA; Anti-Smooth Muscle Antibody; ASMA; F-Actin Antibody; ACTA

Formal name: Smooth Muscle Antibody

At a Glance

Why Get Tested?

To help diagnose chronic active autoimmune hepatitis and distinguish it from other causes of liver injury

When to Get Tested?

When a patient has hepatitis that the doctor suspects may be due to an autoimmune-related process

Sample Required?

A blood sample drawn from a vein in your arm

Test Preparation Needed?

None

This article was last reviewed on May 3, 2009. | This page was last modified on November 14, 2009.

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