Thyroglobulin/Thyroglobulin Autoantibodies (Tg/TGA)
EPIC Test Name: THYROGLOBULIN AND ANTI-THYROGLOBULIN AB
Collect specimen in SST tube. Allow to clot. Centrifuge and store refrigerated. Transport to lab.
Specimen Type: Serum (preferred) or Plasma
Container/Tube: SST or Lithium Heparin (Green top)
Sample Volume: 1.5 mL
Minimum Volume: 0.2 mL (Repeat testing and/or reflex TG by LC-MS/MS is not possible with this specimen volume. )
Stability (collection to time of analysis/testing):
- Refrigerated: 3 days
- Frozen: 2 months
This test should be used only for the surveillance of residual or recurrent differentiated thyroid cancer. Both thyroglobulin (Tg) and thyroglobulin autoantibodies (TGA;or antithyroglobulin autoantibodies) are reported in the results for this test.
TG: Solid-phase, chemiluminescent immunometric assay
TGA: Solid-phase, enzyme-labeled chemiluminescent sequential immunometric assay
1-3 business days
THYROGLOBULIN Ref. Range: 1.6-60.0 ng/mL
THYROGLOBULIN ANTIBODY Ref. Range: 0-<40 IU/mL