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Test Code LAB2538 Thyroglobulin Panel, Stimulated

Additional Codes:

THY STIM

Collection:

Specimen: Blood

Container:  Plain Red

Volume: 4 mL; Minimum 2 mL

Pediatric Collection:

3 Red microtainers filled to 600 uL.

Storage Instructions:

Serum should be separated from red cells when stored or shipped. Specimens that cannot be tested immediately can be refrigerated up to 48 hours. For storage beyond 48 hours, specimens should be frozen.

Turnaround Time (TAT):

Results reported on day of testing

Test Availability:

Batched twice per week – Days vary

Performing Laboratory Section:

Special Chemistry / UMC Main Laboratory

Send To:

UMC MAIN LABORATORY Specimen Receiving – EH319 Hospital Extension

Reference Interval:

Intact Thyroid: < 33 ng/mL 

Note: In athyrotic individuals, Tg levels should be <0.1 ng/mL

Interpretive Data:

In differentiated thyroid cancer (DTC) patients who underwent radioactive iodine remnant ablation, recombinant human TSH (rhTSH) stimulated Tg values below 2 ng/mL indicate low likelihood of residual disease. Note: Beckman Access is a second generation IMA (2G-IMA) with functional sensitivity of 0.1 ng/mL. When this test is used to follow DTC patients, Tg stimulation with rhTSH is not indicated since basal Tg <0.1 ng/mL has comparable NPV to rhTSH stimulated Tg <2 ng/mL for detection of residual disease.