Myelin Associated Glycoprotein (MAG) Ab, IgM




Test Mnemonic

MAGIGM

CPT Codes

  • 83516 - QTY (1)

LOINC ®

17314-6

Aliases

  • MAG IgM
  • Myelin Associated Glycoprotein

Performing Laboratory

ARUP


Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
1 mLSerumSST (Gold) RefrigeratedSeparate serum from cells ASAP or within 2 hours of collection and transfer into standard aliquot tube.

Minimum Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
0.1 mL     

Stability

Environmental Condition Description
AmbientAfter separation from cells: 2 days
RefrigeratedAfter separation from cells: 2 weeks
FrozenAfter separation from cells: 1 year

Days Performed

Tue, Thu, Sat

Turnaround Time

2 - 5 days

Methodology

Name Description
Semi Quantitative Enzyme Linked Immunosorbent Assay 

Reference Range

Myelin Associated Glycoprotein (MAG) Ab, IgM
Sex Age From Age To Type Range Range Unit
       FreetextMAG Antibody, IgM: < 1000 Titer Units 

Special Info

Hemolyzed, severely lipemic, contaminated or heat-inactivated specimens are unacceptable. Urine will be rejected. This test is New York DOH approved.

Clinical Info

This is a stand-alone test for autoimmune neuropathies. The test by itself is not diagnostic, and it should be used in conjunction with other clinical parameters to confirm disease. An elevated IgM antibody concentration > 999 Titer Units (TU) against myelin-associated glycoprotein (MAG) suggests active demyelination in peripheral neuropathy. A normal concentration (< 999 TU) generally rules out an anti-MAG antibody-associated peripheral neuropathy.