Ordering Recommendation

Use with FNA biopsy of thyroid nodules to diagnose benign or malignant non-medullary thyroid nodules.

Mnemonic
THYROG FNA
Methodology

Quantitative Chemiluminescent Immunoassay

Performed

Sun-Sat

Reported

Within 24 hours

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect

Fine needle aspiration in saline.

Specimen Preparation

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.

Storage/Transport Temperature

Frozen.

Unacceptable Conditions

Specimen types other than those listed. Specimens containing EDTA. Viscous specimens.

Remarks

Indicate source on test request form.

Stability

Ambient: 8 hours; Refrigerated: 1 week; Frozen: 6 months

Reference Interval

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 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.

Note
Hotline History
N/A
CPT Codes

84432

Components
Component Test Code* Component Chart Name LOINC
0020754 Thyroglobulin, Fine Needle Aspiration 53922-1
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • FNA TG
Thyroglobulin, Fine Needle Aspiration (FNA)