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Print ISSN: 1792-1074 Online ISSN: 1792-1082
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December-2014 Volume 8 Issue 6

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Article

Predictive factors in patients with EGFR mutation‑negative non‑small cell lung cancer treated with erlotinib

  • Authors:
    • Hidenobu Ishii
    • Koichi Azuma
    • Kazuhiko Yamada
    • Takashi  Kinoshita
    • Youhei Imamura
    • Tomoaki Hoshino
  • View Affiliations / Copyright

    Affiliations: Division of Respirology, Neurology and Rheumatology, Department of Internal Medicine, Kurume University School of Medicine, Kurume, Fukuoka 830‑0011, Japan
  • Pages: 2699-2704
    |
    Published online on: September 18, 2014
       https://doi.org/10.3892/ol.2014.2548
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Abstract

Factors predicting the efficacy of erlotinib treatment in patients with EGFR mutation‑negative non‑small‑cell lung cancer (NSCLC) have not been well studied. This retrospective study investigates whether patient characteristics, such as site of metastasis, can predict the efficacy of erlotinib treatment in NSCLC patients. In total, 53 EGFR mutation‑negative NSCLC patients treated with erlotinib were enrolled, and the associations between clinicopathological characteristics and patient survival were analyzed. The EGFR mutation status was determined using the peptide nucleic acid‑locked nucleic acid polymerase chain reaction clamp method. Survival curves were obtained using the Kaplan‑Meier method. Among the NSCLC patients treated with erlotinib, 27 patients with pulmonary metastasis exhibited significantly longer progression‑free survival (PFS) and overall survival (OS) times than those without pulmonary metastasis (median PFS time, 2.9 versus 1.2 months; P=0.0010 and median OS time, 12.4 versus 4.1 months; P=0.0007). Multivariate analyses also revealed that pulmonary metastasis independently correlated with PFS and OS times (hazard ratio, 0.39; P=0.0055 and hazard ratio, 0.33; P=0.0022, respectively). Patients with pulmonary metastasis exhibited significantly longer PFS and OS times than those without pulmonary metastasis. The presence of pulmonary metastasis may be a predictive factor in patients with EGFR mutation‑negative NSCLC treated with erlotinib.
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Copy and paste a formatted citation
Spandidos Publications style
Ishii H, Azuma K, Yamada K, Kinoshita T, Imamura Y and Hoshino T: Predictive factors in patients with EGFR mutation‑negative non‑small cell lung cancer treated with erlotinib. Oncol Lett 8: 2699-2704, 2014.
APA
Ishii, H., Azuma, K., Yamada, K., Kinoshita, T., Imamura, Y., & Hoshino, T. (2014). Predictive factors in patients with EGFR mutation‑negative non‑small cell lung cancer treated with erlotinib. Oncology Letters, 8, 2699-2704. https://doi.org/10.3892/ol.2014.2548
MLA
Ishii, H., Azuma, K., Yamada, K., Kinoshita, T., Imamura, Y., Hoshino, T."Predictive factors in patients with EGFR mutation‑negative non‑small cell lung cancer treated with erlotinib". Oncology Letters 8.6 (2014): 2699-2704.
Chicago
Ishii, H., Azuma, K., Yamada, K., Kinoshita, T., Imamura, Y., Hoshino, T."Predictive factors in patients with EGFR mutation‑negative non‑small cell lung cancer treated with erlotinib". Oncology Letters 8, no. 6 (2014): 2699-2704. https://doi.org/10.3892/ol.2014.2548
Copy and paste a formatted citation
x
Spandidos Publications style
Ishii H, Azuma K, Yamada K, Kinoshita T, Imamura Y and Hoshino T: Predictive factors in patients with EGFR mutation‑negative non‑small cell lung cancer treated with erlotinib. Oncol Lett 8: 2699-2704, 2014.
APA
Ishii, H., Azuma, K., Yamada, K., Kinoshita, T., Imamura, Y., & Hoshino, T. (2014). Predictive factors in patients with EGFR mutation‑negative non‑small cell lung cancer treated with erlotinib. Oncology Letters, 8, 2699-2704. https://doi.org/10.3892/ol.2014.2548
MLA
Ishii, H., Azuma, K., Yamada, K., Kinoshita, T., Imamura, Y., Hoshino, T."Predictive factors in patients with EGFR mutation‑negative non‑small cell lung cancer treated with erlotinib". Oncology Letters 8.6 (2014): 2699-2704.
Chicago
Ishii, H., Azuma, K., Yamada, K., Kinoshita, T., Imamura, Y., Hoshino, T."Predictive factors in patients with EGFR mutation‑negative non‑small cell lung cancer treated with erlotinib". Oncology Letters 8, no. 6 (2014): 2699-2704. https://doi.org/10.3892/ol.2014.2548
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