What Is Thyroid Cancer?
2. The Thyroid
At the front of the neck is a small butterfly-shaped gland known as the thyroid. It sits directly under the voice box. The thyroid is responsible for making T3, T4 and calcitonin hormones.
The thyroid works closely with the pituitary gland in the brain. When the body needs fewer or more of these three essential hormones, the pituitary sends a signal to the thyroid. It then follows these directions.
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