Factor associated with failure to administer subsequent treatment after progression in the first-line chemotherapy in EGFR-mutant non-small cell lung cancer: Okayama Lung Cancer Study Group experience

Yuka Kato, Katsuyuki Hotta, Nagio Takigawa, Naoyuki Nogami, Toshiyuki Kozuki, Akiko Sato, Eiki Ichihara, Kenichiro Kudo, Isao Oze, Masahiro Tabata, Tetsu Shinkai, Mitsune Tanimoto, Katsuyuki Kiura

Research output: Contribution to journalArticle

8 Citations (Scopus)


Purpose: Early administration of both epidermal growth factor receptor-tyrosine kinase inhibitor (EGFR-TKI) monotherapy and cytotoxic chemotherapy is crucial for non-small cell lung cancer (NSCLC) patients harboring EGFR mutations. We investigated the effect of first-line administration of these therapies on subsequent therapy in NSCLC patients. Methods: This study enrolled 63 consecutive patients with advanced EGFR-mutant NSCLC and good performance status (PS) and who underwent first-line EGFR-TKI therapy or standard cytotoxic chemotherapy and then had progressive disease, from 2007 to 2011. The ability of each patient to receive the other therapy after first-line treatment failure was assessed. Results: In the first-line setting, 23 and 40 patients received EGFR-TKI therapy and cytotoxic chemotherapy, respectively. At relapse, the EGFR-TKI therapy group showed more frequent PS deterioration (p = 0.042) and greater likelihood of symptomatic central nervous system (CNS) relapse (p = 0.093) compared with the cytotoxic chemotherapy group. Nine (39 %) of 23 patients initially receiving EGFR-TKI therapy could not receive standard cytotoxic therapy after progression mainly due to symptomatic CNS relapse. Only one (3 %) of 40 initially treated with cytotoxic chemotherapy failed to receive subsequent EGFR-TKI therapy (p < 0.001). Multivariate analysis revealed a correlation between the first-line therapy and the failure to switch to the other therapy after disease progression (OR 48.605, p = 0.005). Conclusion: In this study, patients who could not receive both EGFR-TKI therapy and cytotoxic chemotherapy in the early-line setting were included more in the first-line EGFR-TKI group, suggesting a potential risk associated with missing the timing of administration of subsequent therapy. Further investigation is warranted to detect their pretreatment clinical or molecular characteristics for development of a new treatment strategy specific for such subpopulation.

Original languageEnglish
Pages (from-to)943-950
Number of pages8
JournalCancer Chemotherapy and Pharmacology
Issue number5
Publication statusPublished - May 2014



  • Cytotoxic chemotherapy
  • First-line setting

ASJC Scopus subject areas

  • Oncology
  • Toxicology
  • Pharmacology
  • Cancer Research
  • Pharmacology (medical)

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