Stand-alone test for autoimmune neuropathies. Test by itself is not diagnostic and should be used in conjunction with other clinical parameters to confirm disease.
Semi-Quantitative Enzyme-Linked Immunosorbent Assay
Tue, Thu, Sat
Serum separator tube.
Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.1 mL)
Urine. Contaminated, heat inactivated, hemolyzed, severely lipemic specimens.
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year
Less than 1000 TU
An elevated IgM antibody concentration greater than 999 TU against myelin-associated glycoprotein (MAG) suggests active demyelination in peripheral neuropathy. A normal concentration (less than 999 TU) generally rules out an anti-MAG antibody-associated peripheral neuropathy.
Laboratory Developed Test (LDT)
|Component Test Code*||Component Chart Name||LOINC|
|0051285||MAG Antibody, IgM Elisa||17314-6|
- MAG Ab
- MAG Antibody
- MAG Antibody by ELISA
- MAG IgM