Roche's Oral SERD Giredestrant Sets New Benchmark in Early ER-Positive Breast Cancer
SHERIDAN, WYOMING - December 2, 2025 - Roche has reported landmark Phase III results for its oral selective estrogen receptor degrader (SERD) giredestrant, positioning the candidate as a potential new standard of care in early-stage ER-positive, HER2-negative breast cancer after a pivotal trial showed superior invasive disease-free survival versus standard endocrine therapy.
First oral SERD to show superior invasive disease-free survival
The Phase III lidERA Breast Cancer study evaluated adjuvant giredestrant against standard-of-care endocrine monotherapy in more than 4,100 patients with medium- or high-risk stage I-III ER-positive, HER2-negative early breast cancer. At a pre-planned interim analysis, the trial met its primary endpoint: giredestrant delivered a statistically significant and clinically meaningful improvement in invasive disease-free survival compared with standard endocrine therapy.