Summary
This is a Phase III, randomized, open-label multicenter study that will evaluate the
efficacy and safety of giredestrant compared with fulvestrant, both in combination with
the investigator's choice of a CDK4/6 inhibitor (palbociclib, ribociclib or abemaciclib),
in participants with estrogen receptor-positive (ER+), human epidermal growth factor
receptor 2-negative (HER2-) advanced breast cancer who have developed resistance to
adjuvant endocrine therapy.