This test detects antibodies directed against mitochondrial M2 antigens, which are strongly associated with autoimmune liver disease, particularly Primary Biliary Cholangitis (PBC).
Diagnostic Value: The presence of M2 antibodies is highly specific for PBC, an autoimmune condition that causes gradual destruction of the bile ducts within the liver.
Clinical Significance: Early detection allows for timely management to slow disease progression and prevent complications such as cirrhosis or liver failure. M2 testing also helps differentiate PBC from other causes of cholestatic liver injury.
Symptom Correlation: Patients may present with persistent fatigue, itching (pruritus), jaundice, or right-upper-quadrant discomfort — symptoms reflecting bile duct inflammation and impaired liver function.
Because of its strong disease specificity, the Mitochondria (M2) Antibody IgG test is essential for confirming autoimmune liver disease and guiding early intervention.