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Trastuzumab pamirtecan shows modest PFS benefit in HR+/HER2-low metastatic breast cancer Phase 3 trial

Company Fundamentals
26 Oct 2026
GlobeNewsWire
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Neutral
Trastuzumab pamirtecan shows modest PFS benefit in HR+/HER2-low metastatic breast cancer Phase 3 trial

BioNTech and DualityBio announced that their Phase 3 trial DYNASTY-Breast02 met its primary endpoint, showing a statistically significant but modest improvement in progression-free survival (PFS) for trastuzumab pamirtecan compared to chemotherapy in HR+/HER2-low metastatic breast cancer patients who progressed on endocrine therapy. Overall survival data are not yet mature, and a higher rate of interstitial lung disease was observed, mostly mild to moderate. The safety profile aligns with previous trials, but the benefit may be limited in the current treatment landscape. The companies plan to review the data and decide on next steps.

Following the announcement of positive Phase 3 trial results for trastuzumab pamirtecan by BioNTech and DualityBio, BioNTech's stock on Pluang is trading at USD 86.58 as of Oct 26, 2026 16:11 WIB, down 1.74% for the day. The stock's market cap stands at $22.13 billion, with a 52-week range between $83.89 and $119.34. Typical investors hold BNTX shares for about 60 days on the platform.

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