Abstract
Background
In Japan, R0 resection has been recommended for colorectal cancer patients with peritoneal metastases confined to the adjacent peritoneum and those with a few metastases to the distant peritoneum. R0 resection for M1c disease has drawn attention in Western countries and is currently considered an acceptable therapeutic option in the US National Comprehensive Cancer Network guidelines. However, clinical factors that affect the choice of R0 resection are unknown.
Methods
This multicenter, prospective, observational study was conducted by the Japanese Society for Cancer of the Colon and Rectum. Colorectal cancer patients with synchronous peritoneal metastases were enrolled at 28 institutions in Japan from October 2012 to December 2016. To determine factors affecting R0 resection and R1 resection with intended R0 resection, stepwise logistic regression analyses were performed on clinical factors including age, sex, performance status (PS), body mass index, peritoneal cancer index (PCI) score, presence of ascites, presence of distant metastases, and primary tumor site.
Results
R0/R1 resection was performed in 36 (31/5; 25%) of 146 patients. No distant metastases [odds ratio (OR) 52.9; 95% confidence interval (CI) 13.3–210.1; p < 0.0001], low PCI score (1–6) (OR 20.0; 95% CI 4.8–83.4; p < 0.0001), and high PS (0) (OR 2.40; 95% CI 0.66–8.68; p = 0.18) were independent factors affecting R0/R1 resection. PCI score and PS were also independent factors affecting R0/R1 resection in M1c patients without non-peritoneal distant metastases (n = 59).
Conclusion
Distant metastases, PCI score, and PS are three factors which affect R0 resection for M1c disease.
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Abbreviations
- AUC:
-
Area under the curve
- CI:
-
Confidence interval
- CRC:
-
Colorectal cancer
- HIPEC:
-
Hyperthermic intraperitoneal chemotherapy
- NCCN:
-
National Comprehensive Cancer Network
- OR:
-
Odds ratio
- OS:
-
Overall survival
- PCI:
-
Peritoneal cancer index
- PS:
-
Performance status
- ROC:
-
Receiver operating characteristic
- TNM classification:
-
Tumor-node-metastasis classification
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Acknowledgements
This study is based on data collected from 28 hospitals participating in a multicenter, prospective, observational study of CRC with synchronous peritoneal metastases conducted by the JSCCR. We thank all the participating patients and their families, as well as investigators and operation staff members. We also thank Masamichi Yasuno (Tokyo Medical and Dental University), Masayuki Ohue (Osaka International Cancer Institute), Hideo Yano (National Center for Global Health and Medicine), Soichiro Ishihara (University of Tokyo), Keiji Koda (Teikyo University Chiba Medical Center), Hirotoshi Kobayashi (Tokyo Metropolitan Hiroo Hospital), Fumio Baba (Kumamoto University), Yoshiharu Sakai (Kyoto University), Yojiro Hashiguchi (Teikyo University), Akio Yamaguchi (University of Fukui), Masato Kusunoki (Mie University), Naohiro Tomita (Hyogo College of Medicine), Tadahiko Masaki (Kyorin University), Yoshito Akagi (Kurume University), Mitsuyoshi Ota (Yokohama City University Medical Center), Kenichi Hakamada (Hirosaki University), and Yasuhiro Kodera (Nagoya University).
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All authors: Study Group for Peritoneal Metastasis from Colorectal Cancer by the Japanese Society for Cancer of the Colon and Rectum.
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Shida, D., Kobayashi, H., Kameyama, M. et al. Factors affecting R0 resection of colorectal cancer with synchronous peritoneal metastases: a multicenter prospective observational study by the Japanese Society for Cancer of the Colon and Rectum. Int J Clin Oncol 25, 330–337 (2020). https://doi.org/10.1007/s10147-019-01562-3
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DOI: https://doi.org/10.1007/s10147-019-01562-3