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Thyroglobulin Antibodies (THGAB)
Test CodeLAB515
Quest Code
267
CPT Codes
86800
Preferred Specimen
1 mL serum in gold top or plain red top tube
Patient Preparation
Dietary supplements containing biotin may interfere in assays and may skew results to be either falsely high or falsely low. For patients receiving the recommended daily doses of biotin, draw samples at least 8 hours following the last biotin supplementation. For patients on mega-doses of biotin supplements, draw samples at least 72 hours following the last biotin supplementation.
Minimum Volume
0.5 mL
Instructions
Administration of STRENSIQ may interfere in certain assays and may falsely elevate values. For patients receiving STRENSIQ, consideration should be given to using alternate methods.
Transport Container
Serum separator tube (SST)
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days
Refrigerated: 7 days
Frozen: 28 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Grossly lipemic
Methodology
Immunoassay (IA)
Setup Schedule
9am Mon, tues, wed, thurs, fri
Report Available
4 days
Limitations
Heterophil antibodies may produce falsely-elevated results.
Reference Range
≤1 IU/mL
Clinical Significance
Measurement of thyroglobulin antibodies is useful in the diagnosis and management of a variety of thyroid disorders including Hashimoto's thyroiditis, Graves' disease and certain types of goiter.
Performing Laboratory
Quest Diagnostics - South Region |