8 hours
Test Updated:
Antismooth Muscle Antibody
Liver Smooth Muscle Antibody
SM
Smooth Muscle Antibody
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Test Overview
Indirect Fluorescent Antibody (IFA), Mouse stomach kidney substrate
Positive in 50-80% of patients with chronic active hepatitis. Titers are negative in extra hepatic biliary obstruction. Antismooth muscle antibodies (SMA) are also seen in acute viral hepatitis; low titers may be seen in primary biliary cirrhosis.
Negative
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Specimen Requirements
Collect specimen in SST tube.Specimen aliquot should be frozen if it's not going to be received in Immunology within 3 days of collection.
Collect specimen in SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate. Specimen aliquot should be frozen if it's not going to be received in Immunology within 3 days of collection.
