Antibodies, Actin (Smooth Muscle) and Mitochondrial M2
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General
Synonym/Acronym:
Antiactin antibody, ASMA; mitochondrial M2 antibody, M2 antibody, AMA.
Common Use:
To assist in the differential diagnosis of chronic liver disease, typically biliary cirrhosis.
Specimen:
Serum collected in a red-top tube.
Normal Findings:
(Method: Immunoassay, enzyme-linked immunosorbent [ELISA])
| Negative | Less than 20 units |
| Weak positive | 20–30 units |
| Positive | Greater than 30 units |
| Negative | Less than 20 units |
| Weak positive | 20.1–24.9 units |
| Positive | Greater than 25 units |
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