The combination of trastuzumab deruxtecan (Enhertu) with pertuzumab (Perjeta) as a first-line treatment for HER2-positive advanced metastatic breast cancer has been shown to reduce the risk for disease progression or death by more than the current standard-of-care treatment.

Sara Tolaney, MD, MPH

Sara Tolaney, MD, MPH, of the Dana-Farber Cancer Institute in Boston, presented this finding and other interim results of the phase 3 DESTINY-Breast09 study, at the American Society of Clinical Oncology (ASCO) 2025 annual meeting in Chicago.

“Trastuzumab deruxtecan, or T-DXd, in combination with pertuzumab demonstrated a statistically significant and clinically meaningful improvement in progression-free survival, with a 44% reduction in the risk of disease progression or death when compared t

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