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Poster Display session 2

3183 - Bevacizumab plus trifluridine/tipiracil in elderly patients with previously untreated metastatic colorectal cancer (KSCC 1602): A single-arm, Phase 2 study

Date

29 Sep 2019

Session

Poster Display session 2

Topics

Tumour Site

Colon and Rectal Cancer

Presenters

Akitaka Makiyama

Citation

Annals of Oncology (2019) 30 (suppl_5): v198-v252. 10.1093/annonc/mdz246

Authors

A. Makiyama1, E. Oki2, Y. Miyamoto3, M. Kotaka4, H. Kawanaka5, K. Miwa6, A. Kabashima7, T. Noguchi8, K. Yuge9, T. Kashiwada10, M. Shimokawa11, H. Saeki12, Y. Akagi13, H. Baba14, M. Mori15

Author affiliations

  • 1 Hematology/oncology, Japan Community Healthcare Organization Kyushu Hospital, 806-8501 - Kitakyushu/JP
  • 2 Department Of Surgery And Science, Graduate School of Medical Sciences, Kyushu University, 812-8582 - Fukuoka/JP
  • 3 Department Of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto/JP
  • 4 Surgery, Sano Hospital-Gastrointestinal Cancer Centre, 655-0031 - Kobe/JP
  • 5 Clinical Research Institute And Department Of Surgery, National Hospital Organization Beppu Medical Center, Beppu/JP
  • 6 Mutidisciplinary Treatment Cancer Center, Kurume University Hospital, 830-0011 - Kurume/JP
  • 7 Department Of Surgery, Oita Medical Center, Oita/JP
  • 8 Department Of Surgery, Imakiire general hospital, Kagoshima/JP
  • 9 Department Of Surgery, Social Insurance Tagawa Hospital, Tagawa/JP
  • 10 Medical Oncology, Saga Univ Facilty of Medicine-Nabeshima, 849-8501 - Saga/JP
  • 11 Department Of Biostatistics, Yamaguchi University Graduate School of Medicine, 755-0046 - Ube/JP
  • 12 General Surgical Science, Gunma University, Maebashi/JP
  • 13 Surgery, Kurume University, Kurume/JP
  • 14 Gastroenterological Surgery, Graduate school of Life Sciences Kumamoto University, Kumamoto/JP
  • 15 Surgery And Science, Kyushu University, Fukuoka/JP

Resources

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Abstract 3183

Background

Elderly patients often cannot tolerate the usual combination of two cytotoxic agents. Recently, bevacizumab plus trifluridine/tipiracil (FTD/TPI) was shown to be a good candidate regimen for vulnerable patients. We aimed to assess the efficacy and safety of bevacizumab plus FTD/TPI in elderly patients with metastatic colorectal cancer.

Methods

Patients aged 70 years or older, with previously untreated unresectable, metastatic colorectal cancer, who were not deemed to be candidates for oxaliplatin-based or irinotecan-based chemotherapy regimens, were included in this trial. The treatment consisted of FTD/TPI (35 mg/m2, twice daily on Days 1–5 and Days 8–12) with bevacizumab (5mg/kg intravenously on Day 1 and 15), administrated every 4 weeks until disease progression. The primary endpoint was progression-free survival (PFS). Based on a previous report, we estimated the expected PFS as 9 months and the lower limit of interest as 5 months. As this research was designed to have a statistical power of 80% and one-sided type I error of 0.10, we calculated that 32 patients were required and planned enrolling 35 patients. The secondary endpoints were response rate (ORR), overall survival (OS), and adverse events (AEs).

Results

Between 2017 January and 2018 March, 39 patients (17 male; 22 female), with a median age of 77.5 years (range: 70–88), ECOG performance status 0 (79.5%) or 1 (20.5%), and RAS WT/MT/Unknown 23.1/41.0/35.9% were enrolled. The median PFS was 8.0 months (80% CI 6.7–11.2), and the median OS was not reached. The best response was 40.5% (15/37; 95% CI: 24.8–57.9), and the disease control rate was 86.5% (32/37; 95% CI: 71.2–95.5). The most frequently occurring grade 3 or 4 AEs were neutropenia (71.8%), leucopenia (48.7%), hypertension (20.5%), anemia (17.9%), anorexia (12.8%), febrile neutropenia (10.3%), and fatigue (10.3%). No treatment-related deaths occurred.

Conclusions

In this Phase 2 KSCC 1602 trial of bevacizumab plus FTD/TPI, the primary endpoint of PFS was achieved. This combination therapy showed favorable survival outcomes with an acceptable safety profile for elderly patients with previously untreated metastatic colorectal cancer.

Clinical trial identification

UMIN000025241.

Editorial acknowledgement

Legal entity responsible for the study

Kyushu Study group of Clinical Cancer.

Funding

Taho Pharmaceutical.

Disclosure

A. Makiyama: Advisory / Consultancy, Speaker Bureau / Expert testimony: Eli Lily Pharmaceutical; Speaker Bureau / Expert testimony: Chugai Pharmaceutical; Speaker Bureau / Expert testimony: Taiho Pharmaceutical; Speaker Bureau / Expert testimony: Takeda Pharmaceutical. M. Kotaka: Honoraria (self): Yakult Honsya; Honoraria (self): Chugai pharmaceutical. H. Baba: Research grant / Funding (institution): Taiho pharmaceutical; Research grant / Funding (institution): Chugai pharmaceutical. M. Mori: Research grant / Funding (institution): Taiho Pharmaceutical Co, Ltd. All other authors have declared no conflicts of interest.

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