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Chinese guidelines for HER2-targeted therapy in gastric and gastroesophageal junction adenocarcinoma (2025 Edition)
Xiaotian Zhang1,2, Yakun Wang1, Muyan Cai3
1State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers, Beijing Key Laboratory of Carcinogenesis and Translational Research, Department of Gastrointestinal Oncology, Peking University Cancer Hospital & Institute, Beijing, 100142, China.
Abstract:
Gastric and gastroesophageal junction adenocarcinoma (GC/GEJC) poses a substantial clinical burden in China. This updated guideline introduces a refined human epidermal growth factor receptor 2 (HER2) classification system (high, intermediate, low, absent) to redefine patient stratification for targeted therapy. It integrates cutting-edge evidence on standardized detection-including immunohistochemistry, in situ hybridization, and liquid biopsy-to overcome spatial-temporal heterogeneity. Recent progress in the use of HER2-targeted agents, including monoclonal antibodies, antibody-drug conjugates, tyrosine kinase inhibitors, and bispecific antibodies, is systematically reviewed and presented to inform evidence-based clinical practice. These updates aim to optimize personalized HER2-targeted therapy and improve outcomes in GC/GEJC patients.
