Summary
This Phase III, randomized, double-blind, placebo-controlled, multicenter study will evaluate
the efficacy and safety of giredestrant combined with palbociclib compared with letrozole
combined with palbociclib in patients with estrogen receptor (ER)-positive, human epidermal
growth factor receptor-2 (HER2)-negative locally advanced (recurrent or progressed) or
metastatic breast cancer.