Myelin-Associated Glycoprotein Antibody

**Semantic type:** Amino Acid, Peptide, or Protein|Immunologic Factor

**Definition:** An autoantibody directed against myelin-associated glycoprotein (MAG). It is associated with active demyelination in peripheral neuropathy and is detected in about 50% of patients with IgM paraproteinemia and may occur in some patients with multiple sclerosis, Guillain-Barre syndrome, chronic polyneuropathy, or myasthenia gravis.

**Synonyms:** - Anti-MAG - Anti-MAG Antibody - Anti-Myelin-Associated Glycoprotein Antibody - MAG Antibody - Myelin-Associated Glycoprotein Autoantibody - Myelin-associated glycoprotein antibody