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Phase II Trial of Adjuvant Chemotherapy with S-1 for Colorectal Liver Metastasis

  • Colorectal Cancer
  • Published:
Annals of Surgical Oncology Aims and scope Submit manuscript

Abstract

Background

This phase II trial was designed to evaluate the safety and efficacy of adjuvant chemotherapy with S-1 in patients with curatively resected liver metastasis from colorectal cancer. Results of an interim analysis of safety and short-term outcomes are reported.

Methods

Patients who underwent curative resection of liver metastasis from colorectal cancer received S-1 monotherapy (on days 1–28, followed by 14 days’ rest, 8 cycles) as adjuvant chemotherapy.

Results

Among 62 patients enrolled between October 2008 and August 2010, a total of 60 patients were eligible for analysis. The most frequent grade 3 or higher hematologic toxicity involved neutropenia in three patients (5.0 %). Nonhematologic toxicities of grade 3 or higher were fatigue in 6.7 % of patients. Grade 4 enteritis occurred in one patient, but resolved promptly after withdrawal of S-1 therapy. The completion rate of the eight scheduled cycles of chemotherapy was 58.3 %. The most common reasons for withdrawal of treatment was the detection of early relapse in 16 patients (64 %). When the 16 patients who had recurrence during adjuvant treatment were excluded from analysis, 79.5 % of the remaining 44 patients completed the scheduled treatment. Early recurrence within 1 year after curative liver resection occurred in 21 patients (35 %). The most common site was the remnant liver in 14 patients.

Conclusions

Orally administered S-1 after curative liver resection has an acceptable toxicity profile and a high rate of completion of the therapy. S-1 can be safely used and might be a viable treatment option in an adjuvant setting.

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Acknowledgment

We are grateful to many other participants of the Nagoya Surgical Oncology Group during the study.

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Corresponding author

Correspondence to Keisuke Uehara MD, PhD.

Additional information

This study was conducted for the Nagoya Surgical Oncology Group.

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Uehara, K., Maeda, A., Sakamoto, E. et al. Phase II Trial of Adjuvant Chemotherapy with S-1 for Colorectal Liver Metastasis. Ann Surg Oncol 20, 475–481 (2013). https://doi.org/10.1245/s10434-012-2665-z

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  • DOI: https://doi.org/10.1245/s10434-012-2665-z

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