The Aim of This Study is to Assess the Efficacy and Safety of Chidamide, Regorafenib in Combination With Iparomlimab and Tuvonralimab for the Treatment of Advanced Colorectal Cancer in Third-line Therapy and Subsequent Lines.

All patients were treated with the following regimen: Chidamide: 30mg per dose, twice a week; Regorafenib: 80mg per dose, once a day, orally for 3 weeks, followed by a 1-week rest, and repeated every 4 weeks; Iparomlimab/Tuvonralimab: 5mg/kg, once every 3 weeks, intravenous infusion.