Clinical Relevance of EGFR in Breast Cancer: Precision Targeting for Better Outcomes
Keywords:
EGFR, Triple-Negative Breast Cancer, Biomarker Stratification, Precision Oncology, Clinical Trials, Monoclonal Antibodies, Tyrosine Kinase Inhibitors, Decentralized Clinical Trials, AI-Assisted Patient SelectionAbstract
Background: Breast cancer remains a leading cause of cancer-related mortality worldwide, with triple-negative breast cancer (TNBC) representing a particularly aggressive subtype comprising 15–20% of all cases and characterized by poor prognosis, high recurrence rates, and limited targeted therapy options. Epidermal growth factor receptor (EGFR), a receptor tyrosine kinase, is frequently overexpressed in TNBC (prevalence 13–89% across cohorts) and drives oncogenesis through dysregulated signaling pathways such as PI3K/AKT and MAPK, promoting proliferation, survival, and metastasis. EGFR expression and mutations serve as promising biomarkers for prognostic stratification and therapeutic selection, yet their clinical translation has been hampered by heterogeneous responses and resistance mechanisms.