What happens after I get my results?

You'll receive detailed doctor notes in simple language explaining what your thyroglobulin levels mean for your thyroid health and cancer monitoring if applicable. These notes include personalized recommendations like follow-up testing timelines, whether to consult an endocrinologist, or if imaging studies might be needed. You'll also get the standard lab report and can track your thyroglobulin levels over time using our trends feature, which is especially helpful for monitoring thyroid cancer recurrence or treatment effectiveness.

When will I get my results?

Results are typically available within 3-5 business days after your blood sample reaches the lab. LC/MS/MS testing requires specialized equipment and technical expertise, which may take slightly longer than standard thyroid tests. You'll receive an email notification as soon as your results are ready to view in your secure online account.

Who should consider this test?

This test is primarily for people who've been treated for differentiated thyroid cancer (papillary or follicular) and need ongoing monitoring for recurrence. It's also useful for those with unexplained thyroid enlargement, suspected thyroid inflammation, or physical injury to the thyroid gland. Your endocrinologist may recommend this test if you have thyroid nodules or if standard thyroglobulin tests are unreliable due to interfering antibodies.

What symptoms indicate I may need this test?

You might need this test if you notice a lump or swelling in your neck, unexplained hoarseness or voice changes, difficulty swallowing, or persistent neck pain. For thyroid cancer survivors, there may be no symptoms at all—this test is used as a surveillance tool even when you feel well. If you've had thyroid surgery and experience returning symptoms like fatigue, weight changes, or temperature sensitivity, this test helps determine if thyroid tissue has regrown.

What is thyroglobulin and why does it matter?

Thyroglobulin is a protein produced exclusively by thyroid cells and is used by your body to make thyroid hormones. In healthy people, small amounts circulate in the blood. After thyroid cancer treatment, thyroglobulin levels should be very low or undetectable since most or all thyroid tissue has been removed. Rising levels can indicate thyroid cancer recurrence, making it a crucial tumor marker for long-term monitoring.

What does high thyroglobulin mean?

High thyroglobulin levels can indicate several conditions including an enlarged thyroid (goiter), thyroid inflammation (thyroiditis), overactive thyroid (hyperthyroidism), or in some cases, thyroid cancer. For thyroid cancer survivors, rising thyroglobulin after treatment may suggest cancer recurrence and typically prompts additional imaging or evaluation. The significance depends on your medical history and whether you still have thyroid tissue.

How often should I retest thyroglobulin?

If you're being monitored for thyroid cancer after treatment, your doctor will typically check thyroglobulin every 6-12 months for the first few years, then annually if levels remain stable. The frequency depends on your cancer stage, treatment type, and risk of recurrence. For other thyroid conditions like goiter or thyroiditis, retesting frequency varies based on your symptoms and treatment response—your endocrinologist will provide a personalized schedule.

What should I do if my thyroglobulin is elevated?

If your thyroglobulin is elevated, the first step is to consult with your endocrinologist or the doctor who ordered the test. They may recommend additional tests like thyroid antibodies, thyroid ultrasound, or radioactive iodine scans to determine the cause. For thyroid cancer survivors, elevated levels may require more frequent monitoring or additional imaging. Treatment depends on the underlying cause and may include medication adjustments, further surveillance, or additional therapy if cancer recurrence is detected.