Smooth Muscle Antibody (ASMA)

Also known as: SMA; Anti-Smooth Muscle Antibody; ASMA; F-Actin Antibody; ACTA
Formal name: Smooth Muscle Antibody
Related tests: Antinuclear antibody (ANA); Autoantibodies; Aspartate aminotransferase (AST); Bilirubin; Antimitochondrial antibody (AMA)

Why should I do it?
To help diagnose chronic active autoimmune hepatitis and distinguish it from other causes of liver injury

When should I do it?
When a patient has hepatitis that the doctor suspects may be due to an autoimmune-related process

What Kind of Sample is Needed?
A blood sample drawn from a vein in your arm

Test Preparation Needed?
None