Thyroglobulin by LCMS-994

Test info

  
Thyroglobulin by LCMS
  
994
  
LAB994
  
MSO
  

Thryoglobulin (Tg) measurement is intended to aid in monitoring for the presence of orthotopic and/or metastatic thyroid tissues in patients who have had thyroid gland ablation (using thyroid surgery with or without radioactivity). Measurement of thyroglobulin antibody (TgAb) is used to identify patient samples that may be affected by TgAb interference in the measurement of Tg. Quantitative TgAb concentrations can also serve as a surrogate tumor marker for DTC recurrence and for monitoring changes in tumor mass in certain patients.

Specimen

  
Serum
  
  
1.5 mL
  
0.6 mL
  

Immediatley following collection, mix sample by gently inverting 5 times

  
  1. Allow sample to clot for a minimum of 30 minutes
  2. Spin within two (2) hours of sample collection
  

Gold serum separator (SST) tube

  
  
  1. Allow sample to clot
  2. Spin
  3. Transfer serum to a Transfer vial/tube with cap - 12mL (LabCorp), labelled as serum, within two (2) hours of sample collection
  
  

Ambient (preferred) - 14 days

Refrigerated - 14 days

  
  • Non-serum sample

Performance

  
LabCorp Burlington (070125): R-NX
  
Mo - Fr
  
4 - 5 days
  

Liquid chromatography with tandem mass spectrometry (LC/MS/MS)

Clinical and Interpretive info

  

Age

Male (ng/mL)

Female (ng/mL)

1 – 25 days

31.6 -101.6

33.4 - 169.9

26 – 31 days

Not established

Not established

1 – 23 months

9.5 - 110.0

12.9 -  92.4

24 months – 7 years

Not established

Not established

8 – 10 years

3.7 -  35.6  

1.7 -  38.4

11- 14 years

3.1 -  23.6

3.7 -  31.0

15 – 17 years

2.7 -  26.0

3.0 -  30.4

>17 years

1.4 -  29.2

1.5 -  38.5

Billing

  
84432

Tracking

  
11/26/2019
  
04/06/2022
  
03/30/2022