alexa A feasibility study of postoperative chemotherapy with S-1 and cisplatin (CDDP) for stage III IV gastric cancer (CCOG 1106).
Oncology

Oncology

Chemotherapy: Open Access

Author(s): Kurimoto K, Ishigure K, Mochizuki Y, Ishiyama A, Matsui T

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BACKGROUND: The standard of care for stage II/III gastric cancer in Japan is D2 dissection followed by adjuvant S-1 monotherapy. Outcome of patients with stage III disease remains unsatisfactory, calling for a more intensive adjuvant chemotherapy regimen, for which evidence in advanced/metastatic cancer research suggests S-1/cisplatin (CDDP) as a candidate. Although S-1/CDDP was poorly tolerated postoperatively in the previous trial, compliance was dramatically improved by insertion of one cycle of S-1 monotherapy, which delayed administration of CDDP by 6 weeks. METHODS: A feasibility study of post-gastrectomy S-1/CDDP was performed. Patients with stage III/IV gastric cancer were eligible. The first cycle of chemotherapy consisted of S-1 monotherapy, and intensive antiemetic drugs were prescribed when patients were administered CDDP. The primary endpoint was the completion rate of four cycles of S-1/CDDP. The secondary endpoints were the relative dose intensity, safety, progression-free survival time and overall survival time. Several criteria to skip, postpone or reduce the dose had been predetermined. RESULTS: Between 2010 and 2011, 33 patients were enrolled. Four patients had stage IIIA disease, 7 patients had stage IIIB disease, 11 patients had stage IIIC disease, and 11 patients had stage IV disease. The completion rate of the protocol treatment was 60.6%. The relative dose intensity of S-1 was 77.3% and that of CDDP was 72.3%. CONCLUSIONS: The protocol-specified delay in the administration of CDDP dramatically improved the relative drug intensity in the postoperative adjuvant setting, although the completion rate did not reach the expected level.

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This article was published in Gastric Cancer. and referenced in Chemotherapy: Open Access

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