Hormones are substances that occur naturally in the body. They act as chemical messengers, which influence the growth and activity of cells. Hormones are produced by a number of different organs or glands which together are known as the endocrine system.
Hormonal therapies work by altering the production or activity of particular hormones in the body. They are most commonly used to treat breast cancer and prostate cancer. The type of hormone therapy given depends on the type of cancer being treated.
There are several different types of hormonal therapy. For more detailed information about a particular treatment, you can use the list of individual therapies.