Thyroglobulin, Fine Needle Aspiration (FNA)
0020753
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
Specimens from New York clients will be sent out to a New York DOH approved laboratory, if possible.
Submit With Order
Specimen Required
Patient Preparation
  
Collect
Fine needle aspiration in saline. Also acceptable: Non-viscous body fluids.  
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
Breast milk and salivary fluid. Specimens containing EDTA. Viscous specimens.  
Remarks
Indicate source on test request form.  
Stability
Ambient: 8 hours; Refrigerated: 48 hours; 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).

See Compliance Statement B: www.aruplab.com/CS
Statement B: 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
 
CPT Code(s)
84432
Components
Component Test Code*Component Chart NameLOINC
0020754Thyroglobulin, Fine Needle Aspiration53922-1
* 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