Summary
This is a Phase III, global, randomized, open-label, multicenter, study evaluating the
efficacy and safety of adjuvant giredestrant compared with endocrine therapy of
physician's choice in participants with medium- and high-risk Stage I-III histologically
confirmed estrogen receptor (ER)-positive and human epidermal growth factor receptor 2
(HER2)-negative early breast cancer.
In addition, an open-label exploratory substudy will explore the safety and efficacy of
giredestrant in combination with abemaciclib in a subset of the primary study population.