hormonal and metabolic disorders
Thyroid Cancer
Introduction
The cause of thyroid cancer is not known, but the thyroid gland is very sensitive to radiation, which may cause cancerous changes. Thyroid cancer is more common among people who were treated with radiation to the head, neck, or chest, most often for noncancerous (benign) conditions, when they were children (although radiation treatment for noncancerous conditions is no longer used). (See also Overview of the Thyroid Gland .) 