Trastuzumab Deruxtecan (T-DXd) With or Without Pertuzumab Versus Taxane, Trastuzumab and Pertuzumab in HER2-positive Metastatic Breast Cancer (DESTINY-Breast09)

Summary

The study will evaluate the efficacy and safety of trastuzumab deruxtecan (also known as T-DXd, DS-8201a), either alone or in combination with pertuzumab, in treating patients with Human epidermal growth factor receptor 2 (HER2)-positive breast cancer as a first line of treatment in the metastatic setting.

Timeline

Start

2021-04-26

Primary completion

2026-07-06

Completion

2029-12-30

Publications

• Tolaney SM, Jiang Z, Zhang Q, Barroso-Sousa R, Park YH, Rimawi MF, Saura C, Schneeweiss A, Toi M, Chae YS, Kemal Y, Chaudhari M, Sendur MAN, Yamashita T, Casalnuovo M, Danso MA, Liu J, Shetty J, Herbolsheimer P, Loibl S; DESTINY-Breast09 Trial Investigators. Trastuzumab Deruxtecan plus Pertuzumab for HER2-Positive Metastatic Breast Cancer. N Engl J Med. 2026 Feb 5;394(6):551-562. doi: 10.1056/NEJMoa2508668. Epub 2025 Oct 29.

Drugs

Indications