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HelpTEST ID HTG2 Thyroglobulin, Tumor Marker, Serum
Reporting Name
Thyroglobulin, Tumor MarkerSpecimen Type
Serum RedOrdering Guidance
For accurate analysis of patients who are known to be thyroglobulin antibody positive, order TGMS / Thyroglobulin Mass Spectrometry, Serum.
Specimen Required
Patient Preparation: Â For 12 hours before specimen collection, patient should not take multivitamins or dietary supplements (eg, hair, skin, and nail supplements) containing biotin (vitamin B7).
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube: Red top (serum gel/SST are not acceptable)
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions: Centrifuge and aliquot serum into a plastic vial.
Specimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum Red | Refrigerated (preferred) | 7 days | |
| Frozen | 30 days | ||
| Ambient | 7 days |
Method Name
Immunoenzymatic Assay
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | OK |
| Gross icterus | Reject |
Reference Values
Thyroglobulin Tumor Marker
Athyrotic: <0.1 ng/mL
Intact thyroid ≤33 ng/mL
Thyroglobulin Antibody:
<1.8 IU/mL
Reference values apply to all ages.
Day(s) Performed
Monday through Saturday
Report Available
1 to 3 daysSpecimen Retention Time
6 monthsPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
84432
86800
Forms
If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:
-General Request (T239)
-Oncology Test Request (T729)
Useful For
Follow-up of patients with differentiated thyroid cancers after thyroidectomy and radioactive iodine ablation
Highlights
All specimens are screened for the presence of autoantibodies to thyroglobulin.