Abstract

The analysis of cell-free DNA in plasma, so called liquid biopsy, significantly improved the detectability of activating and resistance EGFR mutations in advanced non-small cell lung cancer (NSCLC) patients prior EGFR-TKI therapy and upon clinical progression, in particular when sufficient tumor tissue material is not available. Since the acquired resistance to EGFR-TKIs develops gradually under the inhibitor-specific selective pressure, the longitudinal analysis of mutated EGFR in both qualitative and quantitative manner may be more beneficial in term of the real-time treatment monitoring and early detection of resistance mutations.

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