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Geisinger Medical Laboratories Test Catalog
MYELIN-ASSOCIATED-GLYCOPROTEIN (MAG)-SGPG AB (IGM),EIA |
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ORDERING INFORMATION: |
Geisinger Epic Procedure Code: LAB2725 Geisinger Epic ID: 35859 | |
SPECIMEN COLLECTION |
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Specimen type: |
Serum | |
Preferred collection container: |
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Alternate Collection Container: |
3.5 mL gold-top (serum separator) tube
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Specimen required: |
1 mL (minimum 0.2 mL) serum | |
Patient preparation: |
Overnight fasting preferred. | |
| SPECIMEN PROCESSING |
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Transport temperature: |
Refrigerated. | |
Specimen stability: |
Room temperature: 2 days. Refrigerated: 2 weeks. Frozen: 1 month. | |
Rejection criteria: |
Stability limits exceeded. | |
TEST DETAILS |
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Reference interval: |
Accompanies report. | |
CPT code(s): |
83520 | |
| Note: The billing party has sole responsibility for CPT coding. Any questions regarding coding should be directed to the payer being billed. The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only. | ||
Methodology: |
Enzyme Immunoassay (EIA) |
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Synonyms: |
Quest test code 37078 SGPGAB
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Clinical significance: |
Myelin associated glycoprotein (MAG) and sulphated glucuronyl paragloboside (SGPG) antibodies are present in a subgroup of sensory demyelinating neuropathies. Axonal neuropathies can present with only monoclonal IgM anti-SGPG activity. Presence of anti-SGPG antibodies alone is more characteristic of axonal non-demyelinating neuropathy. There is a relationship between the titer of anti-MAG antibodies and the degree of demyelination. | |