Anti Smooth Muscle
Antibody (ASMA)

What is the Anti Smooth Muscle Antibody Test? An anti-smooth muscle antibody (ASMA) test diagnoses antibodies that attack smooth muscle in the blood. The smooth muscle antibody (SMA) is a type of autoantibody that will attack the body's cells and tissues. An ASMA test is primarily used to diagnose autoimmune hepatitis, a disease in which the immune system attacks liver tissues.