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HelpTest Code THYTMM Thyroglobulin, Tumor Marker, Serum
Additional Codes
MAYO: HTG2
EPIC: Thyroglobulin Tumor Marker [LAB2634]
Useful For
Follow-up of patients with differentiated thyroid cancers after thyroidectomy and radioactive iodine ablation
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 |
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 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
84432
86800
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| HTG2 | Thyroglobulin, Tumor Marker | 57780-9 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| TGAB2 | Thyroglobulin Antibody, S | 56536-6 |
| HTGN2 | Thyroglobulin, Tumor Marker, S | 3013-0 |
| HTG2I | Thyroglobulin Interpretation | 69053-7 |
Method Name
Immunoenzymatic Assay
Forms
If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:
-General Request (T239)
-Oncology Test Request (T729)