Test Details
Mnemonic
GBM
Ordering Code
3016100
CPT-4 Code(s)
83516
Specimen Information
Collect
Serum separator tube (SST)
Specimen Preparation
Centrifuge, separate serum from cells and send 1.0 mL serum refrigerated in a screw capped plastic vial.
Alternate Specimen
Lavender EDTA
Minimum Volume
0.5 mL
Transport Temperature
Refrigerated
Rejection Criteria
Heparinized plasma; hemolysis; lipemia
Stability
Room temperature: 8 hours
Refrigerated: 14 days
Frozen: Undetermined
Refrigerated: 14 days
Frozen: Undetermined
Methodology
Fluorescence Enzyme Immunoassay (FEIA)
Reference Range
<7 U/mL Negative
7 – 10 U/mL Equivocal
>10 U/mL Positive
7 – 10 U/mL Equivocal
>10 U/mL Positive
Performing Laboratory
Warde Medical Laboratory