Dai Shida1, Hirotoshi Kobayashi2, Masao Kameyama3, Kazuo Hase4, Kotaro Maeda5, Takeshi Suto6, Michio Itabashi7, Kimihiko Funahashi8, Fumikazu Koyama9, Heita Ozawa10, Shingo Noura11, Hideyuki Ishida12, Yukihide Kanemitsu13, Kenjiro Kotake14, Kenichi Sugihara15. 1. Department of Colorectal Surgery, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 1040045, Japan. dshida@ncc.go.jp. 2. Department of Surgery, Teikyo University Mizonokuchi Hospital, Kawasaki, Japan. 3. Department of Surgery, Bell Land General Hospital, Sakai, Japan. 4. National Defense Medical College, Tokorozawa, Japan. 5. International Medical Center, Fujita Health University Hospital, Toyoake, Japan. 6. Department of Gastroenterological Surgery, Yamagata Prefectural Central Hospital, Yamagata, Japan. 7. Department of Surgery, Institute of Gastroenterology, Tokyo Women's Medical University, Tokyo, Japan. 8. Department of General and Gastroenterological Surgery, Toho University Omori Medical Center, Tokyo, Japan. 9. Department of Surgery, Nara Medical University, Kashihara, Japan. 10. Department of Surgery, Tochigi Cancer Center, Utsunomiya, Japan. 11. Department of Surgery, Osaka Rosai Hospital, Sakai, Japan. 12. Department of Digestive Tract and General Surgery, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan. 13. Department of Colorectal Surgery, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 1040045, Japan. 14. Department of Gastroenterology and Surgery, Sano City Hospital, Sano, Japan. 15. Tokyo Medical and Dental University, Tokyo, Japan.
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.
BACKGROUND: In Japan, R0 resection has been recommended for colorectal cancerpatients 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 cancerpatients 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.
Entities:
Keywords:
Colorectal cancer; Peritoneal cancer index score; Peritoneal metastasis; R0 resection
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