THYROID CANCER Thyroid cancer develops in your thyroid, a small, butterfly-shaped gland at the base of your neck. This gland produces hormones that regulate your metabolism. Let's change the world together Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window