Anti-Mitochondrial Antibody (AMA) by IFA is a blood test that detects antibodies directed against components of mitochondria using the indirect immunofluorescence assay (IFA) method. It is primarily used to support the evaluation of primary biliary cholangitis (PBC), an autoimmune liver disease affecting the small bile ducts. The test may be recommended when abnormal liver enzymes, particularly elevated alkaline phosphatase, or symptoms suggest an autoimmune liver condition.
AMAs are autoantibodies produced by the immune system that target components of mitochondria, particularly mitochondrial antigens associated with PBC.
PBC is a chronic autoimmune liver disease in which the immune system progressively damages the small bile ducts within the liver.
A positive AMA result indicates that anti-mitochondrial antibodies were detected. It strongly supports PBC when combined with compatible liver test abnormalities and clinical findings.
AMA positivity alone does not always establish a diagnosis. Your healthcare provider will consider liver enzyme results, symptoms, medical history, and sometimes imaging or other tests.
A negative result means detectable anti-mitochondrial antibodies were not identified by the test. However, a small proportion of people with PBC may be AMA-negative.
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