Estrogen receptor (ER)-positive, HER2-negative breast cancer
Surgical removal of tumor
The purpose of this study is to compare the effects, good or bad, of giredestrant versus an approved endocrine therapy (a treatment that blocks or removes hormones), on patients with your type of cancer. Giredestrant is an experimental treatment, which means this new drug is being investigated to treat your type of cancer, but it has not been approved by health authorities including the Therapeutic Goods Administration (TGA) in Australia for cancer treatment or treatment of any other disease.
Giredestrant is designed to block the sex hormone called estrogen that contributes to your cancer's growth.
In this study, you will get either giredestrant or a drug chosen specifically for you by your study doctor. You can participate in this study based on your breast cancer characteristics, your current condition and how well you tolerated previous anti -cancer therapies.