Thyroid nodules

Your healthcare provider may order any of the following tests to help diagnose and evaluate a thyroid nodule:

Thyroid blood test: This test checks the levels of thyroid hormone in your blood. The hormone levels are usually normal even if you have nodules, but they can be abnormal in some cases and point to thyroid disease.

Thyroid ultrasound: This is an imaging test that uses sound waves to create pictures of your thyroid gland. It can determine if a nodule is solid or a fluid-filled cyst. (The risk of cancer is higher in solid nodules.) This test also checks on the growth of nodules and helps find nodules that are difficult to feel. In addition, providers sometimes use ultrasound to help guide the placement of the needle during a fine-needle biopsy.

Fine-needle biopsy: With this test, your provider uses a very thin needle to take a sample of cells from one or more thyroid nodules. They then send the samples to a laboratory for evaluation. Most nodules are noncancerous. However, if the test results are inconclusive, your provider may repeat this test. They may also suggest you have surgery to remove the nodules to make an accurate diagnosis.

Thyroid scan: In this test, you take a small amount of radioactive iodine orally. Your provider will check to see how much of the radioactive iodine the thyroid nodules absorb and how much is absorbed by normal thyroid tissue. This will provide further information about the thyroid nodules, helping your provider determine the likelihood of cancer.

Treatment depends on the type of thyroid nodule. Treatment options include:

No treatment/watch and wait: If the nodules aren’t cancerous, you and your healthcare provider may decide that you don’t need to be treated at this time. You’ll see your provider regularly so they can check for any changes in the nodules.

Radioactive iodine: Your provider may use radioactive iodine to treat hyperfunctioning thyroid nodules and goiters with several nodules. Your thyroid gland absorbs the radioactive iodine, causing the nodules to shrink.

Surgery: Surgery to take out the nodules is the best treatment for nodules that are cancerous, cause obstructive symptoms like breathing or swallowing issues and are “suspicious” (they can’t be diagnosed without being surgically removed and examined.