Merck’s blockbuster anti-PD-1 therapy Keytruda is inching its way toward another potential indication, this time a chemotherapy combo pre-surgery in patients with high-risk, early-stage ER+/HER2- breast cancer.
While Merck did not share specific data from its interim analysis of its Phase III KEYNOTE-756 trial, the pharma said the drug combo hit one of the dual primary endpoints: showing a “statistically significant improvement” in pathological complete response (pCR) rate compared to a placebo plus chemo in the 1,240-patient trial. A pCR is “a lack of all signs of cancer” following neoadjuvant therapy and surgery.
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