Pfizer Breast Cancer Drug Could Fill Void Left By Avastin Withdrawal

Pfizer’s novel oral CDK 4/6 inhibitor PD-03392991, in combination with letrozole, delivered a statistically and clinically significant increase in median progression-free survival for women with advanced ER+/HER2- breast cancer, according to interim Phase II data presented Dec. 5 at the San Antonio Breast Cancer Symposium.