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Myelin-Associated Glycoprotein Autoantibodies, IgM, Serum

Myelin-Associated Glycoprotein, MAG, Sulfoglucuronyl Paragloboside, SGPG, MAG Dual Antigen Autoantibody Test, Myelin-Associated Glycoprotein (MAG) and Sulfoglucuronyl Paragloboside Evaluation

Test Codes

EPIC: LAB12308395, Beaker: XMAGM, MAYO: FMGA

Department

Send Outs

Specimen Collection Criteria

Collect (preferred specimen): One Gold-top SST tube.
Also acceptable: One plain Red-top tube.

Physician Office/Draw Specimen Preparation

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells within two hours of collection. Transfer serum to a plastic transport tube and refrigerate (2-8°C or 36-46°F).

Preparation for Courier Transport

Transport: 2.0 mL serum, refrigerated (2-8°C or 36-46°F). (Minimum: 0.6 mL)

Rejection Criteria

• Hemolyzed specimens.
• Specimens not collected and processed as indicated.

In-Lab Processing

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells within two hours of collection. Transfer serum to a plastic transport tube and refrigerate (2-8°C or 36-46°F).

Transport: 1.0 mL serum, refrigerated (2-8°C or 36-46°F). (Minimum: 0.5 mL)

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 24 hours
Refrigerated (2-8°C or 36-46°F): 7 days
Frozen (-20°C/-4°F or below): 30 days

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Laboratory

Sent to Mayo Clinic Laboratories in Rochester, MN. Forwarded to Quest Diagnostics Lab.

Performed

Monday, Wednesday.
Results available in 6-15 days.

Reference Range

By report.

Test Methodology

Western Blot and Enzyme Immunoassay.

Interpretation

By report.

Clinical Utility

This assay aids in the diagnosis of demyelinating sensory and sensorimotor peripheral neuropathy.

CPT Codes

84181 and 83520 x2 (if needed).

Contacts

Last Updated

11/6/2024