The Myelin Associated Glycoprotein (MAG) Antibodies test is a diagnostic procedure used to detect the presence of antibodies against myelin-associated glycoprotein in the blood. Myelin-associated glycoprotein is a protein found in the myelin sheath, the protective covering of nerve fibres in the nervous system. The presence of antibodies against this protein is often associated with certain neurological disorders, notably demyelinating peripheral neuropathies.

The MAG antibodies test is primarily utilized when a patient presents with symptoms suggestive of a peripheral neuropathy, such as numbness, tingling, or weakness in the limbs. It can also be useful in monitoring disease progression and response to treatment in individuals diagnosed with a demyelinating peripheral neuropathy.

A positive result indicates the presence of antibodies against myelin-associated glycoprotein in your blood. This is often associated with certain types of peripheral neuropathy, specifically those involving demyelination of nerves. A positive result should be discussed with your healthcare provider who will interpret the results in the context of your symptoms, medical history, and other test results. They may recommend further testing or refer you to a neurologist for a more detailed evaluation.