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Ziihera® (zanidatamab-hrii) Combinations Achieve Unprecedented Results in First-Line HER2+ Locally Advanced or Metastatic GEA including more than Two Years Median Overall Survival Benefit

Positive results from Phase 3 HERIZON-GEA-01 results support Ziihera as the HER2-targeted agent-of-choice in HER2+ first-line metastatic GEA and Ziihera plus chemotherapy to replace trastuzumab as the new standard of care, with or without tislelizumab regardless of PD-L1 statusLate-breaking results to be presented at the 2026 ASCO Gastrointestinal Cancers Symposium (ASCO GI) on January 8, 2026Ziihera engineered and initially developed by Zymeworks using our proprietary Azymetric™ technology plat

articleZymeworks Inc.January 6, 202612/company/zymeworks-inc-common-stock/news/ziiherar-zanidatamab-hrii-combinations-achieve-unprecedented-results-in-first-line-her2-locally-advanced-or-metastatic-gea-including-more-than-two-years-median-overall-survival-benefit
Ziihera® (zanidatamab-hrii) Combinations Achieve Unprecedented Results in First-Line HER2+ Locally Advanced or Metastatic GEA including more than Two Years Median Overall Survival Benefit

About this update from Zymeworks Inc.

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GEAchemotherapygastroesophageal junctionpatients