This test measures IgM antibodies against cardiolipin, an important marker for Antiphospholipid Syndrome (APS) and autoimmune-related clotting disorders. Like the IgG type, it helps identify autoimmune activity that increases the risk of blood clots.
Diagnostic Value: Anti-Cardiolipin IgM antibodies can appear earlier in disease progression and are useful in identifying cases where IgG levels are still normal.
Clinical Significance: Elevated IgM levels may be associated with venous or arterial thrombosis, as well as pregnancy complications. Persistent positivity confirms autoimmune activity rather than transient infection-related elevation.
Symptom Correlation: Patients may experience leg swelling (due to clots), chest pain, shortness of breath, or recurrent miscarriages.
Testing for all three isotypes (IgA, IgG, and IgM) provides the most complete evaluation of antiphospholipid antibody activity and helps guide treatment and preventive care.