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HelpTest Code GQ1ESSO Ganglioside GQ1b Antibody, IgG, ELISA, Serum
Additional Codes
Mayo Test Code: GQ1ES
Necessary Information
Provide the following information:
1. Relevant clinical information
2. Ordering provider name, phone number, mailing address, and email address
Specimen Required
Patient Preparation: For optimal antibody detection, specimen collection is recommended to occur prior to initiation of immunosuppressant medication or intravenous immunoglobulin treatment.
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube:
Preferred: Red top
Acceptable: Serum gel
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions: Centrifuge and aliquot serum into a plastic vial.
Useful For
Evaluating patients with an underlying demyelinating neuropathy
Supporting the diagnosis of a ganglioside GQ1b IgG-related disorder
Method Name
Enzyme-Linked Immunosorbent Assay (ELISA)
Reporting Name
GQ1b-IgG ELISA, SSpecimen Type
SerumSpecimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum | Refrigerated (preferred) | 28 days |
| Frozen | 28 days | |
| Ambient | 72 hours |
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
| Gross icterus | Reject |
Reference Values
Negative
Cautions
A negative result does not exclude the presence of disease. The use of immunotherapy prior to specimen collection may negatively impact the sensitivity of this assay.
Testing for ganglioside GQ1b antibodies should be performed near the onset of disease.
This test should be interpreted in the appropriate clinical context.
Day(s) Performed
Monday, Wednesday, Friday
Report Available
5 to 8 daysSpecimen Retention Time
2 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.CPT Code Information
83516
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| GQ1ES | GQ1b-IgG ELISA, S | 63254-7 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 621107 | GQ1b-IgG ELISA, S | 63254-7 |
Forms
If not ordering electronically, complete, print, and send a Neurology Specialty Testing Client Test Request (T732) with the specimen.