Thyroglobulin Test Price in Pakistan: Rs 1,610 at Marham Lab

A thyroglobulin test measures the amount of a protein called thyroglobulin in your blood. MedlinePlus explains that your thyroid, a small butterfly-shaped gland in your neck, makes thyroglobulin along with many other important hormones. At Marham Lab the test costs Rs 1,610, reduced from Rs 2,300.

Saying it first, because thyroglobulin is described everywhere as a tumour marker and people read that as a cancer test.

MedlinePlus explains that the most common causes of high thyroglobulin are two types of thyroid cancer, papillary carcinoma and follicular thyroid cancer, in which cancerous cells produce thyroglobulin. That is why it is usually measured as a tumour marker.

Then it gives the limit: other conditions also affect thyroglobulin, including hyperthyroidism, hypothyroidism and thyroiditis, which is inflammation of the thyroid that can cause a temporary rise. Because such a wide range of conditions can affect thyroglobulin levels, health care providers do not use the results from a thyroglobulin test to diagnose cancer.

If you have not been diagnosed with thyroid cancer, this is almost certainly not the test you need. Start with a [thyroid profile](/labs/tests/free-thyroid-test-price).

MedlinePlus lists three jobs, all of them after a thyroid cancer diagnosis.

• Seeing if treatment worked. It explains that the goal of thyroid cancer treatment is usually to get rid of all thyroid tissue, healthy cells and cancer cells alike. So if treatment is successful there should be little or no thyroglobulin in your blood. If thyroglobulin remains, you may need treatment again
• Predicting how your cancer will behave over time, which it calls a prognosis, telling you how likely it is your cancer will return and respond to treatment
• Seeing if cancer has returned. Since successful treatment removes all thyroid tissue, thyroglobulin appearing afterwards may mean the cancer is back

It adds that a provider may also order the test to diagnose and monitor non-cancerous conditions such as hyperthyroidism and hypothyroidism, and in rarer cases to check for thyroid inflammation caused by a viral infection such as COVID-19.

MedlinePlus sets out the timing. You may need a thyroglobulin test before starting treatment for thyroid cancer, so your provider can compare results afterwards. Then four to six weeks after treatment, to check whether all thyroid tissue has been removed. Then regularly after successful treatment, to make sure the cancer has not come back.

This is the most practical thing on this page, and missing it wastes the test.

MedlinePlus states that a thyroglobulin test may not be useful for monitoring your thyroid cancer treatment if you have thyroglobulin antibodies in your blood. It explains these antibodies attach to thyroglobulin and can make your thyroglobulin levels appear lower than they really are.

It then gives the standard practice: your provider will usually order a [thyroid antibody test](/labs/tests/anti-thyroglobulin-test-price) to find out whether thyroglobulin testing will be useful at all. If you have thyroglobulin antibodies, other tests will be used instead to see whether your cancer treatment was successful.

A falsely low number in cancer follow-up is a dangerous kind of wrong. Ask whether your anti-Tg status is known before relying on a Tg result.

MedlinePlus is specific. Labs use different methods to measure thyroglobulin, and the test method can affect your results. It states it is important to have your tests done the same way, and usually in the same lab, so your provider can compare your results over time.

For a test whose whole purpose is tracking a number across months and years, switching labs between visits breaks the comparison. If your previous reports are from one lab, think carefully before moving.

MedlinePlus notes that understanding results after treatment can be complicated, and that the meaning depends on your health history, the type of treatment you had and other test results. In general, after thyroid cancer treatment:

Very low levels or no thyroglobulin may mean treatment successfully removed all thyroid tissue including cancerous tissue, though MedlinePlus notes you will still need more testing over time to be sure.

Levels that stay high or increase may mean treatment did not remove all thyroid tissue, or that you still have thyroid cancer, or that the cancer has grown or spread.

Levels that were low after treatment and later increased may mean the cancer has come back.

Because other thyroid conditions and certain illnesses also affect thyroglobulin, MedlinePlus notes your provider will likely check your levels over time rather than relying on a single result.

MedlinePlus states you usually do not need special preparation for a thyroglobulin test, though you need to avoid taking certain vitamins or supplements, so tell your provider about everything you take. Biotin-containing supplements are a common reason a thyroid-related result comes back misleading, so mention them.

A trained phlebotomist takes a blood sample from a vein in your arm, which usually takes less than five minutes. In Lahore the sample can be collected at your home at no extra cost.