Abstract
Background
The Kyushu Study Group of Clinical Cancer (KSCC) conducted phase II trials of KSCC1002 (UMIN000001308) concerning liver resectability after first-line treatment of initially unresectable or not optimally resectable colorectal liver metastases in a prospective, multicenter study.
Methods
Patients with wild-type KRAS received 4–6 cycles of S-1 and oxaliplatin (SOX) plus cetuximab. Liver resectability was evaluated subsequently with the liver resection rate as the primary endpoint.
Results
Of the 33 patients enrolled between March 2010 and July 2013, the median number of administration cycles was 4 (range 0–10). The overall response rate was 63.6 % (95 % confidence interval [CI] 45.1–79.6 %). Liver resection was possible in 16 of 33 (48.5 %) patients, and there were 13 R0 cases (39.4 %). We conducted a central review of liver resectability evaluated by five liver surgeons, and the resectability increased from 18.2 to 66.7 % after chemotherapy, based on imaging. The median overall survival for all 33 cases was 31.6 months (95 % CI 14.8–not reached). The median progression-free survival was 9.7 months (95 % CI 6.2–11.8).
Conclusions
SOX plus cetuximab is safe and effective for advanced colorectal cancer with limited liver metastasis, and may lead to high liver resectability.
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Acknowledgment
The authors thank the participating patients and their families. We are indebted to the physicians and all other medical staff. We also thank Ms. Sakamoto and the staff at the Clinical Research Support Center Kyushu for their excellent data collection and management, secretarial assistance, and support.
Conflict of interest
No disclosures: YE, YMi, AK, HH, YO, MI, HS, ST, KS, MT, SU, MS and SN; College course financially maintained by private donations that Yakult Honsha Co. provides: TB and YMa; College course financially maintained by private donations that Taiho Pharmaceutical Co. provides: YMa; Acceptance such as the researchers from Taiho Pharmaceutical Co., Ltd: YMa; Grant research funding from Taiho Pharmaceutical Co., Ltd.: SE, YA, HB and YMa; Grant research funding from Yakult Honsha Co., Ltd.: SE, YA, HB; Lecturer’s fee from Taiho Pharmaceutical Co., Ltd.: YE, SE, YK, HB; Lecturer’s fee from Yakult Honsha Co., Ltd.: YE, SE, HB and YMa; Lecturer’s fee from Taiho Pharmaceutical Co., Ltd. and Yakult Honsha Co., Ltd.: YA.
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10434_2015_4771_MOESM1_ESM.docx
Representative images before (A) and after (B) chemotherapy. A: Before chemotherapy.A 70-mm metastatic tumor contacts the hepatic vein. B: After chemotherapy. The tumorwas reduced to 28 mm and was separated from the vein. Supplementary material 1 (DOCX 15 kb)
10434_2015_4771_MOESM2_ESM.pdf
Cumulative progression-free survival (A) and overall survival (B) curves in patients withinitially unresectable liver metastases, according to the existence or nonexistence ofhepatic resection. Solid line: patients with hepatic resection, dotted line: patients withouthepatic resection. Supplementary material 2 (PDF 528 kb)
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Oki, E., Emi, Y., Miyamoto, Y. et al. Phase II Trial of S-1 and Oxaliplatin Plus Cetuximab for Colorectal Cancer Patients with Initially Unresectable or Not Optimally Resectable Liver Metastases (KSCC1002). Ann Surg Oncol 22 (Suppl 3), 1067–1074 (2015). https://doi.org/10.1245/s10434-015-4771-1
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DOI: https://doi.org/10.1245/s10434-015-4771-1