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I-131 for Thyroid Conditions

The molecular radiology team at the Theranostics Center at ARA diagnoses and treats two kinds of thyroid conditions: Hyperthyroidism and Thyroid Cancer.


  • Hyperthyroidism is a condition in which the thyroid gland produces too much hormone, causing symptoms such as nervousness, anxiety, rapid heartbeat, weight loss, insomnia, tremors, and more. Hyperthyroidism can be caused by several factors, such as Graves’ disease (an autoimmune disorder), toxic nodular goiter (enlarged thyroid with overactive nodules), or inflammation of the thyroid (thyroiditis).

    Find out more about diagnosing and treating hyperthyroidism

  • Thyroid Cancer is a condition in which abnormal cells grow and multiply in the thyroid gland. These cells can form a lump or nodule in the thyroid, and they can spread to nearby tissues and organs.

    Find out more about diagnosing and treating thyroid cancer

A diagnostic image with the thyroid gland highlighted in pink.

What is the thyroid gland?

The thyroid gland is a small, butterfly-shaped organ located at the base of the neck that produces hormones that regulate many functions of the body, such as metabolism, heart rate, blood pressure and body temperature. Sometimes, the thyroid can become overactive (hyperthyroidism) or underactive (hypothyroidism), causing various symptoms and health problems. In some cases, thyroid cells can also become cancerous and grow uncontrollably.