Phase II Study of Irinotecan and Cisplatin in Extensive-stage Small Cell Lung Cancer

This is a randomized, multicenter study. Patients are randomized to irinotecan/cisplatin (IP) or etoposide/cisplatin (EP) treatment arms. The IP regimen consisted of at most 6 cycles of irinotecan 65 mg/m2 of body-surface area on days 1, 8 and cisplatin 75mg/m2 of body-surface area on day 1. The EP regimen consisted of at most 6 cycles of etoposide 100 mg/m2 of body-surface area from day 1 to 3 and cisplatin 75mg/m2 of body-surface area on day 1. Cycle length for the two arms was 3 weeks. The dose adjustment was allowed in at most within ±5% per investigator discretion if necessary.