ArticleThoracic cancer2021
Impact of the generation of EGFR-TKIs administered as prior therapy on the efficacy of osimertinib in patients with non-small cell lung cancer harboring EGFR T790M mutation.
Article in Thoracic cancer, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed, 4 citations in OpenAlex.
- Real-world treatment outcomes in South Korean patients with epidermal growth factor receptor-mutant non-small cell lung cancer.The Korean journal of internal medicine · 2025Article
- Real-world outcomes of treatment strategy between first-line osimertinib, first/second-generation EGFR-TKIs followed by osimertinib and without osimertinib in advanced EGFR-mutant NSCLC.ESMO real world data and digital oncology · 2024Article
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11 authors at 1 institution in 1 country.
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Abstract
backgroundThere are few studies that directly compare the effects of osimertinib on patients with non-small cell lung cancer (NSCLC) harboring epidermal growth factor receptor (EGFR) T790M mutation between the generation of prior EGFR tyrosine kinase inhibitors (TKIs).
methodsWe retrospectively reviewed clinical data from the medical records of consecutive patients with advanced NSCLC who had developed resistance to first- or second-generation EGFR-TKIs due to EGFR T790M mutation and were subsequently treated with osimertinib at Juntendo University Hospital. In patients with available tumor samples, target amplicon sequencing analyses were performed to explore the genetic biomarkers.
resultsA total of 38 patients with NSCLC harboring EGFR T790M mutation were treated with osimertinib. Eight patients were classified into group A (afatinib followed by osimertinib) and 30 patients were classified into group B (first-generation EGFR-TKI followed by osimertinib). Progression-free survival (PFS) was significantly longer in group A than in group B (median PFS; not reached vs. 11.0 months, P = 0.018). Fourteen patients had available tissue samples collected before osimertinib treatment for target sequencing. In group A we found no additional mutations, other than EGFR T790M mutation. On the other hand, there were three samples in which other mutations emerged, in addition to EGFR T790M mutation, in group B.
conclusionsPFS of osimertinib was significantly longer in patients with NSCLC harboring EGFR T790M mutation after treatment with afatinib than in patients after treatment with first generation EGFR-TKIs. Additional mutations other than EGFR T790M may affect the efficacy of osimertinib treatment. KEY POINTS: Significant findings of the study: PFS of osimertinib was significantly longer in patients with NSCLC harboring EGFR T790M mutation after treatment with afatinib than in patients after treatment with first generation EGFR-TKIs. WHAT THIS STUDY ADDS: Additional mutations other than EGFR T790M may affect the efficacy of osimertinib treatment.
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