Test Code LAB90012 Glutamic Acid Decarboxylase (GAD65) Antibody Assay, Spinal Fluid
Additional Codes
Mayo Test ID |
---|
GD65C |
48036
Reporting Name
GAD65 Ab Assay, CSFUseful For
Possible use in evaluating patients with autoimmune encephalitis, stiff-person syndrome, autoimmune ataxia, autoimmune epilepsy, and other acquired central nervous system disorders affecting gabaminergic neurotransmission
Performing Laboratory
Mayo Clinic Laboratories in RochesterSpecimen Type
CSFOrdering Guidance
This test should not be requested in patients who have recently received radioisotopes, therapeutically or diagnostically, because of potential assay interference. The specific waiting period before specimen collection will depend on the isotope administered, the dose given, and the clearance rate in the individual patient. Specimens will be screened for radioactivity prior to analysis. Radioactive specimens received in the laboratory will be held one week and assayed if sufficiently decayed or canceled if radioactivity remains.
Specimen Required
Container/Tube: Sterile vial
Specimen Volume: 1.5 mL
Collection Instructions: Submit specimen from collection vial 2.
Specimen Minimum Volume
1 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
CSF | Refrigerated (preferred) | 28 days | |
Frozen | 28 days | ||
Ambient | 72 hours |
Reference Values
≤0.02 nmol/L
Reference values apply to all ages.
Day(s) Performed
Monday through Sunday
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
86341
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
GD65C | GAD65 Ab Assay, CSF | 94359-7 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
21702 | GAD65 Ab Assay, CSF | 94359-7 |
Report Available
3 to 6 daysMethod Name
Radioimmunoassay (RIA)
Forms
If not ordering electronically, complete, print, and send a Neurology Specialty Testing Client Test Request (T732) with the specimen.