SI-B001 Combined With Irinotecan in the Treatment of Recurrent Metastatic Esophageal Squamous Cell Carcinoma.

Administered by intravenous drip every 2 weeks (Q2W). The first intravenous infusion is 120 min±10min. If the infusion reaction can be tolerated during the first infusion, the subsequent infusion can be completed in 60-120 min.

The dose of irinotecan was 180mg/m2 Q2W, the infusion method was according to the drug instructions, SI-B001 and irinotecan were used on the same day, and irinotecan was injected after SI-B001 infusion.