SEP 11, 2026 · JOURNAL ARTICLE
Trastuzumab Botidotin Versus Trastuzumab Emtansine in Human Epidermal Growth Factor Receptor 2–Positive Advanced Breast Cancer: A Phase III, Open-Label, Randomized Controlled Trial
Journal of Clinical Oncology
Phase 3 RCT with rigorous design (BICR-assessed primary endpoint, blinded review, 1:1 randomization) showing statistically significant and clinically meaningful PFS improvement (HR 0.39, p<.0001) meeting prespecified superiority boundary, though OS remains immature.
Reported
Median PFS, trastuzumab botidotin11.1 months
Median PFS, trastuzumab emtansine4.4 months
Hazard ratio (PFS)0.39