definition of thyroid cancer
Cancer Education. Thyroid cancer occurs in the cells of the thyroid â a butterfly-shaped gland located at the base of your neck, just below your Adam's apple.Your thyroid produces hormones that regulate your heart rate, blood pressure, body temperature and weight.ancer Education. Thyroid cancer occurs in the cells of the thyroid â a butterfly-shaped gland located at the base of your neck, just below your Adam's apple. Your thyroid produces hormones that regulate your heart rate, blood pressure, body temperature and weight.