This test detects IgG antibodies against Beta-2 Glycoprotein 1 (β2GPI), a key marker in diagnosing Antiphospholipid Syndrome (APS). These antibodies interfere with normal clotting regulation and promote abnormal blood clot formation in veins and arteries.
Diagnostic Value: Anti-β2GPI IgG is considered the most clinically significant of all β2GPI isotypes and is included in the official APS diagnostic criteria. Persistent positive results, confirmed at least 12 weeks apart, indicate autoimmune origin rather than transient infection-related elevation.
Clinical Significance: Associated with venous thrombosis, pulmonary embolism, stroke, and recurrent miscarriage, especially when combined with other antiphospholipid antibodies.
Symptom Correlation: Patients may experience leg swelling, chest pain, or neurological symptoms from clotting events.
Because of its strong diagnostic weight, the Beta-2 Glycoprotein 1 IgG test is essential for confirming APS and guiding appropriate long-term management.