General Information About the Test
Test Process and Preparation
If the entire thyroid gland has been removed through successful cancer surgery or if radioactive iodine treatment has been received, the Thyroglobulin (Tg) level in the blood is expected to be very close to zero. If the value begins to rise over time, it is suspected that cancerous thyroid cells are growing again somewhere in the body (lymph node, lungs, etc.).
It is an antibody produced by the immune system against thyroglobulin. If Anti-Tg is present in the blood, it masks the result of the Thyroglobulin test, causing it to appear falsely low. For this reason, the two tests are always evaluated together.
Because the thyroglobulin test is not affected by food intake, strict fasting is not required. It is performed by drawing blood from an arm vein at any time of the day.
The information on this page is for informational purposes only. The results of medical tests must be evaluated by specialist physicians.
