Summary
Objectives In EGFR-mutated non-small cell lung cancer (NSCLC) patients, approximately 80–90% of leptomeningeal metastasis (LM) develops after failed initial treatment with epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor (EGFR-TKI). However, the efficacy of rechallenging with previously administered EGFR-TKIs in patients with EGFR-mutated NSCLC and the LM that develops following EGFR-TKI treatment failure remains unknown. Materials and methods We retrospectively reviewed medical records of patients with EGFR-mutated NSCLC and LM, from November 2011 to August 2019. The patients were classified according to the LM treatment type: switched to previously unadministered EGFR-TKIs (Switch-TKI) or rechallenge with previously administered EGFR-TKIs (Rechallenge-TKI). Results In total, 50 patients treated with EGFR-TKI after LM diagnosis were included; 35 were treated with Switch-TKI and 15 with Rechallenge-TKI. The median overall survival (OS) from the time of LM diagnosis was 6.2 months in all study patients. According to the treatment type, the median OS from the time of LM diagnosis was 6.9 months in Switch-TKI patients and 4.9 months in Rechallenge-TKI patients. There was no significant difference in the OS between the Switch-TKI and Rechallenge-TKI groups (P = 0.864). Thirty-five patients were treated with erlotinib and 15 with osimertinib; Regardless of the type for EGFR-TKI, there was no significant difference in OS between patients treated with Switch-TKI and those treated with Rechallenge-TKI. Conclusion Rechallenge of previously administered EGFR-TKIs may be a therapeutic option for LM development after EGFR-TKI treatment failure in patients with EGFR-mutated NSCLC, not only switching to previously unadministered EGFR-TKIs.
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TM and HK wrote the manuscript and researched data. HK reviewed and edited the manuscript. KM is a professional biostatistician and responsible for statistical analysis. All authors reviewed, approved the final version of the manuscript.
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Dr. Kenmotsu reports grants and personal fees from Chugai Pharmaceutical Co, Ltd., personal fees from Ono Pharmaceutical Co, Ltd., personal fees from Boeringer Ingelheim, personal fees from Eli Lilly K.K, personal fees from Kyowa Hakko Kirin Co., Ltd., personal fees from Bristol-Myers Squibb, personal fees from MSD, grants and personal fees from Novartis Pharma K.K., grants and personal fees from Daiichi-Sankyo Co., Ltd., grants and personal fees from AstraZeneca K.K., personal fees from Pfizer, personal fees from Taiho Pharma, outside the submitted work. Dr. Mamesaya reports personal fees from AstraZeneca KK, Pfizer Japan, Inc., personal fees from Chugai Pharmaceutical Co., Ltd., grants and personal fees from Boehringer Ingelheim, personal fees from MSD K.K., personal fees from TAIHO PHARMACEUTICAL CO., LTD., personal fees from ONO PHARMACEUTICAL CO., LTD., outside the submitted work. Dr. Kobayashi reports personal fees from Eli Lilly K.K, personal fees from Taiho Pharmaceutical, personal fees from AstraZeneca, outside the submitted work. Dr. Omori reports personal fees from Chugai Pharmaceutical Co., Ltd., Ono Pharmaceutical, AstraZeneca K.K., Boehringer Ingelheim, Taiho Pharmaceutical, and MSD, which are unrelated to the submitted work. Dr. Wakuda reports grants and personal fees from Chugai Pharmaceutical Co., Ltd., personal fees from Taiho Pharmaceutical, personal fees from Boehringer Ingelheim, personal fees from Eli Lilly K.K., personal fees from Ono Pharmaceutical, personal fees from MSD, grants and personal fees from Astrazeneca, grants from Novartis, grants from Abbvie, outside the submitted work. Dr. Ono reports grants from Taiho Pharmaceutical, grants from Ono Pharmaceutical, grants from Chugai Pharmaceutical Co., Ltd., grants from Novartis Pharma K.K., outside the submitted work. Dr. Murakami reports personal fees from AstraZeneca K.K., Ono Pharmaceutical, Bristol-Myers Squibb Japan, Chugai Pharmaceutical Co., Ltd., Pfizer Inc., Novartis Pharma K.K., Boehringer Ingelheim, Taiho Pharmaceutical, Eli Lilly K.K., and MSD, which are unrelated to the submitted work. Dr. Harada reports personal fees from Daiichi Sankyo Pharmaceutical Co. during the conduct of the study as well as personal fees from Daiichi Sankyo Pharmaceutical Co., AstraZeneca K.K., Brain Labo Co., and Chugai Pharmaceutical Co. and grants from the Japan Agency for Medical Research and Development and the National Cancer Center Research and Development Fund, which are unrelated to the submitted work. Dr. Kazuhisa Takahashi reports grants and personal fees from AstraZeneca K.K., Pfizer Japan, Inc., Eli Lilly K.K., MSD, and Boehringer Ingelheim as well as grants from Takeda Pharmaceutical Company Ltd., Chugai Pharmaceutical Co., Ltd., Taiho Pharmaceutical Co., Ltd., KYORIN Pharmaceutical Co., Ltd., Ono Pharmaceutical Co., Ltd., GlaxoSmithKline Consumer Healthcare Japan K.K., SHIONOGI & CO., LTD., and Novartis Pharma K.K., which are unrelated to the submitted work. Dr. Toshiaki Takahashi reports grants and personal fees from AstraZeneca KK, Pfizer Japan, Inc., grants and personal fees from Eli Lilly Japan K.K., grants and personal fees from Chugai Pharmaceutical Co., Ltd., grants and personal fees from Ono Pharmaceutical Co., Ltd., grants and personal fees from MSD K.K., grants and personal fees from Boehringer Ingelheim Japan, Inc., grants and personal fees from Pfizer Japan, Inc., personal fees from Roche Diagnostics K.K., outside the submitted work. Others—Declarations of interest: none.
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Miyawaki, T., Kenmotsu, H., Yabe, M. et al. Rechallenge with previously administered epidermal growth factor receptor-tyrosine kinase inhibitors in EGFR-mutated non-small cell lung cancer with leptomeningeal metastasis. Invest New Drugs 39, 1732–1741 (2021). https://doi.org/10.1007/s10637-021-01140-3
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DOI: https://doi.org/10.1007/s10637-021-01140-3