Deciding Between a Biomarker-Directed Approach and a Biomarker-Agnostic Approach for Second-Line Treatment of EGFR-Mutant NSCLC

Opinion
Video

Panelists discuss how their approach to second-line treatment decision-making prioritizes biomarker-directed therapies over biomarker-agnostic approaches, with clinicians preferring to exhaust all targeted therapy options based on molecular alterations identified through rebiopsy and plasma testing before moving to tumor-agnostic treatments like trastuzumab deruxtecan or docetaxel, emphasizing the importance of molecular matching for optimal patient outcomes.

This segment explores the strategic decision-making process between biomarker-directed and biomarker-agnostic approaches for second-line treatment of EGFR-mutant metastatic non–small cell lung cancer (NSCLC). The discussion occurs in the context of expanding treatment options, including the recent availability of trastuzumab deruxtecan for EGFR-mutant disease and the potential for chemotherapy as a treatment class depending on frontline therapy choices. The panel addresses how clinicians prioritize between targeted therapies that require specific biomarkers vs broader approaches that don’t depend on molecular alterations.

The preferred clinical approach emphasizes exhausting all available targeted therapy options before transitioning to biomarker-agnostic treatments. This strategy prioritizes maximizing the use of precision medicine approaches, such as utilizing amivantamab in the second-line setting if it wasn’t used in the front line, and targeting specific resistance alterations identified through molecular testing. Only after depleting targeted options do clinicians consider biomarker-agnostic approaches like trastuzumab deruxtecan or docetaxel. This sequential approach reflects the principle that targeted therapies typically offer superior efficacy and tolerability profiles when appropriate molecular targets are present.

The implementation of this strategy requires comprehensive molecular profiling at disease progression, with increased utilization of plasma-based testing for patients experiencing disease progression. The decision-making process considers patient fitness for tissue rebiopsy, patient preferences regarding invasive procedures, and the potential for identifying actionable molecular alterations that could guide targeted therapy selection. Clinical teams are systematically reviewing molecular testing reports before initiating second-line therapy to ensure optimal treatment matching. This approach represents a commitment to personalized medicine principles, where the goal is to match each patient with the most appropriate targeted therapy based on their specific molecular profile before considering broader treatment approaches that don’t require specific biomarkers for efficacy.

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