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Thyroglobulin, Fine Needle Aspiration (FNA)
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Use with FNA biopsy of thyroid nodules to diagnose benign or malignant non-medullary thyroid nodules.
Quantitative Chemiluminescent Immunoassay
Sun-Sat
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.
Frozen.
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
By report
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).
Compliance Statement B: For laboratory developed tests not using a RUO kit, and for FDA approved, cleared or 510(k) exempt assays with alterations. This test was developed and its performance characteristics determined by ARUP Laboratories. The U. S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.
84432
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 0020754 | Thyroglobulin, Fine Needle Aspiration | 53922-1 |
- FNA TG
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