Thyroglobulin Panel
Fasting Required: No

Lab: Quest Diagnostics

Specimen: Blood

Results: 5-7 business days
Note: Result turnaround times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.

Includes: Thyroglobulin, Thyroglobulin Antibodies

Patient Instructions: 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.

Description: Thyroglobulin is a protein that is found primarily in the thyroid gland. Some thyroglobulin can be found in the blood. This blood test also looks for antibodies made by your body in response to thyroglobulin. Thyroglobulin antibodies attack thyroglobulin proteins and can destroy the thyroid gland itself. The test can be used to distinguish an autoimmune thyroid disease from other thyroid diseases. For example, to find the causes of goiters or high/low thyroid hormone levels.

Alternative Name(s): TG and ATG, ATG and TG