Abstract
Background
Data regarding treatment sequence for vulnerable patients with metastatic colorectal cancer (mCRC) in a real-world setting are lacking.
Objective
We aimed to assess treatment outcomes in second-line or later chemotherapy for vulnerable patients with mCRC in a real-world setting.
Patients and Methods
Vulnerable patients with mCRC who received less intensive treatment (‘vulnerable’) regimens, i.e. fluoropyrimidines with or without biologics (FP), reduced-dose doublet regimens with or without biologics (Doublet), and anti-epidermal growth factor receptor monotherapy (Anti-EGFR), as first-line therapy between June 2015 and December 2018 were retrospectively reviewed.
Results
A total of 210 patients from 15 hospitals were analyzed. The median age was 78 years (range 28–90), and 44 patients (21%) had an Eastern Cooperative Oncology Group performance status (ECOG PS) score of 2. In the entire population, the median time to treatment failure (TTF) and overall survival (OS) were 7.6 and 21.4 months, respectively. Following the failure of first-line therapy in 195 patients, 74 (38%), 24 (12%), and 13 (7%) patients received vulnerable regimens, full-dose doublet regimens with or without biologics, and other regimens, respectively, whereas 84 (43%) received best supportive care (BSC). In patients receiving vulnerable regimens as second-line therapy, the median TTF and OS were 4.4 and 13.7 months, respectively, while response rate and disease control rate were 18% and 62%, respectively. In 84 patients who received BSC, the median OS was 3.5 months.
Conclusions
Second-line chemotherapy for vulnerable patients with mCRC showed clinically meaningful outcomes; however, few patients received second-line therapy, and survival among patients who received BSC was dismal.
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The authors would like to thank Enago (www.enago.jp) for the English language review.
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Conflicts of Interest
Seiichiro Mitani received payment or honoraria from Taiho Pharmaceutical Co. and MSD K.K., and participation on the advisory board of Chugai Pharmaceutical Co. Ltd. Yosuke Kito received honoraria from Taiho Pharmaceutical Co., Ono Pharmaceutical Co., and Daiichi Sankyo. Kenji Tsuchihashi received grants from Ono Pharmaceutical Co. Toshihiko Matsumoto received payment or honoraria from Bayer Co. Ltd, Bristol Myers Squibb Co. Ltd, Chugai Pharmaceutical Co. Ltd, Daiichi Sankyo Co. Ltd, Eli Lilly Japan K.K., Merck Biopharma Co. Ltd, MSD Co. Ltd, Ono Pharmaceutical Co. Ltd, Sanofi Co. Ltd, Taiho Pharmaceutical Co. Ltd, Takeda Pharmaceutical Co. Ltd, and Teijin Pharmaceutical Co. Hisato Kawakami received consulting fees from Daiichi-Sankyo Co. Ltd; honoraria from Bristol-Myers Squibb Co. Ltd, Eli Lilly Japan K.K., MSD K.K., Ono Pharmaceutical Co. Ltd, Chugai Pharmaceutical Co. Ltd, Daiichi Sankyo Co. Ltd, Merck Biopharma Co., Ltd, Takeda Pharmaceutical Co. Ltd, Yakult Pharmaceutical Industry, Teijin Pharma Ltd, Incyte Biosciences Japan, Yakult Pharmaceutical Industry, Taiho Pharmaceutical Co. Ltd, Glaxo Smith Kline K.K., and Otsuka Pharmaceutical Co., Ltd; and research funding from Chugai Pharmaceutical Co. Ltd, Taiho Pharmaceutical Co. Ltd, Kobayashi Pharmaceutical. Co., Ltd, and Eisai Co. Ltd. Kaori Hino, Kentaro Kawakami, Naoki Izawa, Fumiyasu Hanamura, Yoshiyuki Yamamoto, Hirokazu Shoji, Azusa Komori, Shogen Boku, Kyoko Kato, Yoshikane Nonagase, Mitsuhiro Furuta have no potential conflicts of interest to declare.
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All procedures were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and its later versions. This study was reviewed and approved by the Institutional Review Boards of Kindai University (number: R03-183), and, subsequently, approval by all the participating Institutional Review Boards was obtained.
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Informed consent, or a substitute for it, was obtained from all patients included in this study.
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SM, YK, and HK contributed to the study’s conception and design. Material preparation and data collection were performed by SM, YK, KH, KK, NI, FH, YY, HS, AK, SB, KT, KK, YN, TM, and MF. Data analysis was conducted by YK. The first draft of the manuscript was written by SM and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Mitani, S., Kito, Y., Hino, K. et al. Real-World Treatment Sequencing in Vulnerable Patients with Metastatic Colorectal Cancer: A Multicenter Retrospective Study. Targ Oncol 18, 707–715 (2023). https://doi.org/10.1007/s11523-023-00996-0
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DOI: https://doi.org/10.1007/s11523-023-00996-0