Phase II Study of Oral S-1 Plus Irinotecan in Patients with Advanced Colorectal Cancer: Hokkaido Gastrointestinal Cancer Study Group HGCSG0302

We have previously reported on phase I/II studies of irinotecan plus S-1 therapy for advanced gastric cancer. Based on the safety and efficacy data that were obtained, this phase II study was planned to assess the efficacy of irinotecan plus S-1 for patients with advanced colorectral cancer. A total of 40 patients are enrolled at 13 medical institutions. The objective of this study was to establish a useful chemotherapy regimen for an out-patient setting.