ARUP's Laboratory Test Directory

0020753: Thyroglobulin, Fine Needle Aspiration (FNA)

Test Mnemonic: THYROG FNA
Methodology: Chemiluminescent Immunoassay

Performed: Sun-Sat

Reported: 1-3 days

Specimen Required:  
Collect: Fine needle aspiration in saline.

Transport: 0.5 mL saline needle rinse at 2-8°C. (Min: 0.5 mL)

Pediatric Collection/Transport: 0.5 mL saline needle rinse at 2-8°C.

Remarks: Indicate source on test request form. Centrifuge to remove cellular material. Specimen must be clear, not viscous or bloody, and clear of particulate matter. Frozen specimens are also acceptable.

Unacceptable Conditions: Viscous or bloody specimens.

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

Reference Interval:
By report

Interpretive Data:
Thyroglobulin (Tg) is measured by the Beckman 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.



CPT Code(s):
84432