The thyroid is a small gland in the front of your neck just below your voicebox (larynx). Each year, about 3,400 people in the UK are diagnosed with thyroid cancer. It is more common in women than men. Like most types of cancer, thyroid cancer is more common in people as they get older.
https://www.macmillan.org.uk/cancer-information-and-support/thyroid-cancer