Synonym/Acronym:
antiactin antibody, ASMA; mitochondrial M2 antibody, M2 antibody, AMA.
Rationale
To assist in the differential diagnosis of chronic liver disease, typically biliary cholangitis.
Patient Preparation
There are no food, fluid, activity, or medication restrictions unless by medical direction.
Normal Findings
Method: Indirect fluorescent antibody.
| 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 24.9 units |
Critical Findings and Potential Interventions
N/A
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