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Myelin Associated Glycoprotein (MAG) Antibody, with Reflex to MAG-SGPG and MAG, EIA : 10063
Test CodeMAGIGM or 10063
Alias/See Also
MAG Antibody
CPT Codes
84181
Includes
If MAG Antibody (IgM), WB is positive, then MAG-SGPG Antibody (IgM), EIA and MAG Antibody (IgM), EIA, will be performed at an additional charge (CPT codes: 83520x2)
Instructions
Overnight fasting is preferred.
Serum separator tube.
Serum separator tube.
Transport Container
Centrifuge serum separator tube and transport, 2 ml serum (Min: 0.6 mL).
Transport Temperature
Refrigerated.
Specimen Stability
Room temperature: 24 hours; Refrigerated: 7 days; Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Avoid Hemolysis
Methodology
Western Blot (WB); if reflex, Enzyme-Linked Immunosorbent Assay
Setup Schedule
Monday & Wednesday
Report Available
6 days (From receipt at performing laboratory)
Limitations
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Reference Range
MAG Ab (IgM), WB Negative
If reflex:
MAG-SGPG Ab (IgM), EIA ≤1:1600 titer
MAG Ab (IgM), EIA <1:1600 titer
Interpretation:
MAG Antibody (IgM), EIA
Normal <1:1600
Moderately elevated 1:1600-1:3200
Highly elevated ≥1:6400
If reflex:
MAG-SGPG Ab (IgM), EIA ≤1:1600 titer
MAG Ab (IgM), EIA <1:1600 titer
Interpretation:
MAG Antibody (IgM), EIA
Normal <1:1600
Moderately elevated 1:1600-1:3200
Highly elevated ≥1:6400
Clinical Significance
MAG, Western Blot with reflexes is useful in detecting antibodies associated with autoimmune peripheral neuropathy.
Performing Laboratory
Quest Diagnostics