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Biomarker-Stratified Phase II Trial of Trastuzumab Rezetecan in Advanced Salivary Gland Carcinoma Across Cohorts With High and Low Human Epidermal Growth Factor Receptor 2 Expression

PURPOSE Systemic treatment options for advanced salivary gland carcinoma (SGC) are limited, and prospective data for human epidermal growth factor receptor 2 (HER2)–directed therapy remain sparse, particularly in HER2-low disease. We evaluated trastuzumab rezetecan (SHR-A1811), a...