Sponsor: Merck
Sponsor Study ID: MK3475-756
Study Title: A Randomized, Double-Blind, Phase III Study of Pembrolizumab versus Placebo in Combination with Neoadjuvant Chemotherapy and Adjuvant Endocrine Therapy for the Treatment of High-Risk Early-Stage Hormone Receptor-Positive, Human Epidermal Growth Factor Receptor 2-Negative (HR+/HER2) Breast Cancer (KEYNOTE-756)
CTO #: 102863
NCT Number: NCT03725059
Phase: III
Protocol Type: Treatment
Age Group: Adults
Disease Sites: Breast
Study Objectives: Study participants will receive 8 cycles of neoadjuvant study treatment and then will undergo surgery for their breast cancer. After surgery, participants will receive 9 cycles of study treatment and up to 10 years of variable endocrine therapy. Each cycle is 21 days long.The primary study hypotheses are: 1) pembrolizumab is superior to placebo, both in combination with the protocol-specified neoadjuvant anticancer therapy, as assessed by pathological Complete Response (pCR) rate defined by the local pathologist, and 2) pembrolizumab is superior to placebo (both in combination with the protocol-specified neoadjuvant and adjuvant anticancer therapies) as assessed by Event-Free Survival (EFS) as determined by the investigator.