Laboratory Medicine

Test catalogue

Anti-Thyroglobulin (Anti-Tg)
Test Name Anti-Thyroglobulin (Anti-Tg)
Specimen Type / Requirements Container Type = 1 Gold Top (SST) Minimum Testing Volume = 0.5 mL serum Tube must fill to at least ½ or greater of its vacuum capacity
Specimen Handling Collection Instructions: Collect sample in gold or red top tube with or without gel separator. Write your initials, date and time of collection on the collection label or requisition. Laboratory Staff Instructions: Separate serum or plasma from cells within 2 hours of collection Rejection Criteria: Gross hemolysis, unlabeled or samples of non sufficient quantity. Stability: Stable at room temperature for 4 days, refrigerated 4 days and frozen 3 months. Transportation: Send sample to core lab as soon as possible.
Required Documentation
Turnaround Time (TAT) 10 days	Reference Value < 40 kIU/L
Test Utilization A reflex system has been developed such that if Anti-Tg is significantly elevated, no thyroglobulin level will be reported. The Anti-Tg threshold for diagnosis of autoimmune thyroid disease is different than for assay interference. At UHT, there is potential for Anti-Tg interference with the thyroglobulin assay at levels >20 kIU/L. Please contact the core lab x5082 if you have an exceptional circumstance that warrants repeat testing or if you have any questions
Test code ATG	Methodology Competitive Immunoassay
Testing Location SMH-Biochemistry	Other Information Last Updated: June 22, 2026

Anti-Thyroglobulin (Anti-Tg)

Test Name

Anti-Thyroglobulin (Anti-Tg)

Specimen Type / Requirements

Container Type = 1 Gold Top (SST)

Minimum Testing Volume = 0.5 mL serum

Tube must fill to at least ½ or greater of its vacuum capacity

Specimen Handling

Collection Instructions: Collect sample in gold or red top tube with or without gel separator. Write your initials, date and time of collection on the collection label or requisition.

Laboratory Staff Instructions: Separate serum or plasma from cells within 2 hours of collection

Rejection Criteria: Gross hemolysis, unlabeled or samples of non sufficient quantity.

Stability: Stable at room temperature for 4 days, refrigerated 4 days and frozen 3 months.

Transportation: Send sample to core lab as soon as possible.

Required Documentation

Turnaround Time (TAT)

10 days

Reference Value

< 40 kIU/L

Test Utilization

A reflex system has been developed such that if Anti-Tg is significantly elevated, no thyroglobulin level will be reported. The Anti-Tg threshold for diagnosis of autoimmune thyroid disease is different than for assay interference. At UHT, there is potential for Anti-Tg interference with the thyroglobulin assay at levels >20 kIU/L. Please contact the core lab x5082 if you have an exceptional circumstance that warrants repeat testing or if you have any questions

Test code

ATG

Methodology

Competitive Immunoassay

Testing Location

SMH-Biochemistry

Other Information

Last Updated: June 22, 2026