Liposomal Irinotecan Combination Regimen for First-line Treatment of Small Cell Lung Cancer

"Cohort 1: Liposomal irinotecan: 50mg/m2, ivgtt, d1; Carboplatin AUC=5, ivgtt, d1; Serplulimab: 4.5mg/kg, ivgtt, d1; The drug was administered once every three weeks for a total of 4 cycles. After 4 cycles, serplulimab is maintained until disease progression or toxicity becomes intolerable.~Cohort 2: Etoposide: 100 mg/m2, ivgtt, d1-3; Carboplatin AUC=5, ivgtt, d1; Serplulimab: 4.5mg/kg, ivgtt, d1; The drug was administered once every three weeks for a total of 4 cycles. After 4 cycles, serplulimab is maintained until disease progression or toxicity becomes intolerable."