Use with FNA biopsy of thyroid nodules to diagnose benign or malignant nonmedullary thyroid nodules.
Quantitative Chemiluminescent Immunoassay
Within 24 hours
Fine needle aspiration in saline.
Centrifuge to remove cellular material. Specimen must be non-viscous and free of particulate matter. Transport 0.5 mL saline needle rinse. (Min: 0.5 mL) Also acceptable: Heparinized specimens.
Specimen types other than those listed. Specimens containing EDTA. Viscous specimens.
Indicate source on test request form.
Ambient: 8 hours; Refrigerated: 1 week; Frozen: 6 months
Thyroglobulin (Tg) is measured by the Beckman Coulter Access method. Results obtained with different assay methods or kits cannot be used interchangeably. The Tg result, regardless of concentration, should not be interpreted as absolute evidence for the presence or absence of papillary or follicular thyroid cancer. This test is FDA cleared but is not labeled for use with FNA fluid.
The performance characteristics of this test were determined by ARUP.
Normal values are less than 10 ng/mL (Baloch ZW et al., CytoJournal 2008, 5:1).
Laboratory Developed Test (LDT)
|Component Test Code*||Component Chart Name||LOINC|
|0020754||Thyroglobulin, Fine Needle Aspiration||53922-1|
- FNA TG