Thyroglobulin/Thyroglobulin Autoantibodies (Tg/TGA)

Additional Information:

EPIC Test Name: THYROGLOBULIN AND ANTI-THYROGLOBULIN AB

CPT Code(s):

84432/86800

Collection Procedure:

Collect specimen in SST tube. Allow to clot. Centrifuge and store refrigerated. Transport to lab.

Specimen Requirements:

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. )
Storage: Refrigerate.
Stability (collection to time of analysis/testing):

  • Refrigerated: 3 days
  • Frozen: 2 months

Use:

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.

Methodology:

TG: Solid-phase, chemiluminescent immunometric assay
TGA: Solid-phase, enzyme-labeled chemiluminescent sequential immunometric assay

Reported:

1-3 business days

Reference Values:

THYROGLOBULIN Ref. Range: 1.6-60.0 ng/mL
THYROGLOBULIN ANTIBODY Ref. Range: 0-<40 IU/mL

Performed:

Monday- Friday