Thyroglobulin, Fine Needle Aspiration
Label Mnemonic: TGFNA
Epic Lab Code: LAB7860
Downtime Form: A-1a Miscellaneous Request
Commercial Mail-out Laboratory
5231 RCP
356-8593
Specimen(s):
Specimen must be non-viscous and free of particulate matter
Specimen Instructions:
Indicate source on test request form.
Minimum:
0.5 mL saline needle rinse.
Rejection Criteria:
Breast milk and salivary fluid. Specimens containing EDTA. Viscous specimens.
Delivery Instructions:
Deliver to laboratory immediately after collection.
Turn Around Time:
24 hours upon receipt at reference laboratory
Reference Range:
By report
Interpretive Data:
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 the reference laboratory.

Normal values are less than 10 ng/mL (Baloch ZW et al., CytoJournal 2008, 5:1).
Comments:
Use with FNA biopsy of thyroid nodules to diagnose benign or malignant non-medullary thyroid nodules.
Methodology:
Quantitative Chemiluminescent Immunoassay
CPT Code:
84432