Abstract
Purpose
The efficacy of gefitinib [an epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor] in elderly patients with non-small cell lung cancer (NSCLC) and EGFR mutation has not been elucidated. Therefore, the objective of this study was to investigate the efficacy and feasibility of gefitinib in elderly chemotherapy-naive patients with NSCLC harboring sensitive EGFR mutations.
Methods
We retrospectively evaluated the clinical effects of gefitinib as a first-line treatment for elderly (≥75 years) NSCLC patients with EGFR mutations (exon 19 deletion or exon 21 L858R mutation). All patients were initially treated with gefitinib (250 mg/day) at seven institutions.
Results
Between January 2006 and December 2012, 62 patients (17 men, 45 women) with a median age of 80 years (range, 75–89 years) were included in our analysis. The overall response and disease control rates were 61.2 and 83.8 %, respectively, and the median progression-free survival and overall survival were 13.2 and 19.0 months, respectively. Common adverse events included rash, diarrhea, and liver dysfunction. Major grade 3 or 4 toxicities included skin rash (3.2 %) and increased levels of aspartate aminotransferase or alanine aminotransferase (21.0 %). Gefitinib treatment was discontinued owing to adverse events of liver dysfunction in 3 patients, drug-induced pneumonitis in 2, and diarrhea in 1.
Conclusion
First-line gefitinib could be a preferable standard treatment in elderly patients with advanced NSCLC harboring sensitive EGFR mutations.
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Acknowledgments
We thank Drs. Takashi Osaki, Mie Kotake, Yosuke Kamide, Akihiro Ono, and Yasuhiko Koga for their assistance in preparing this manuscript.
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T. Kuwako and H. Imai have contributed equally to this work.
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Kuwako, T., Imai, H., Masuda, T. et al. First-line gefitinib treatment in elderly patients (aged ≥75 years) with non-small cell lung cancer harboring EGFR mutations. Cancer Chemother Pharmacol 76, 761–769 (2015). https://doi.org/10.1007/s00280-015-2841-5
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DOI: https://doi.org/10.1007/s00280-015-2841-5