Breast cancer cells that have a receptor protein to which oestrogen will attach. Breast cancer cells that are ER+ depend on the hormone oestrogen to grow….

Drugs used to treat cancer that depend on hormones to grow.

A female sex hormone produced mainly by the ovaries that helps mature and regulate the female reproductive system….

Drugs that help prevent the growth of oestrogen-dependent cancer cells by reducing the amount of oestrogen in a post-menopausal woman’s body.

Stopping the ovaries from producing oestrogen, which is done surgically (oopherectomy) or with radiation therapy.

An anti-oestrogen hormone treatment….