Cadonilimab as Neoadjuvant Therapy in Resectable Stage II-III MSI-H/dMMR Colorectal Cancer

Exclusion Criteria

• •1. Previous any systemic anticancer therapy for colorectal cancer disease, including chemotherapy, radiothapy or immunotherapy
• •2. Previously received anti-programmed death-1 (PD-1) or its ligand (PD-L1) antibody, anti-cytotoxic T lymphocyte-associated antigen 4 (cytotoxic T-lymphocyte-associated Protein 4, CTLA-4) antibody or other drug/antibody that acts on T cell costimulation or checkpoint pathways.
• •3. Subjects with known allergy to monoclonal antibodies
• •4. Previous or concurrent cancer that is distinct in primary site or histology from colon cancer within 2 years prior to study drug treatment.
• •5. Concurrent with active autoimmune disease or Participants with a history of autoimmune disease who may recur
• •6. Subjects receiving immunosuppressive agents (such as steroids, or corticosteroids at physiologic replacement doses, equivalent to ≤ 10 mg prednisone daily ) for any reason within 14 days before the study drug treatment.
• •7. Uncontrolled hypertension or hyperglycemia within 14 days before the study drug treatment.
• •8. Uncontrolled pleural effusion, pericardial effusion, or ascites requiring frequent drainage (recurrent within 14 days of study drug treatment)
• •9. History of interstitial lung disease, noninfectious pneumonia, or poorly controlled lung disease (including pulmonary fibrosis, acute lung disease).
• •10. Active systemic bacterial, viral, or fungal infection， requiring systemic treatment within 14 days before study drug treatment.
• •11. Positive test for hepatitis B virus surface antigen with HBV DNA\> 500 IU/mL（\> 2500copies/mL）at screening or untreated Chronic hepatitis B
• •12. Positive test for hepatitis C virus ribonucleic acid (if antihepatitis C virus antibody tested positive) at screening;
• •13. Known history of testing positive for human immunodeficiency virus (HIV)
• •14. Major surgery for any reason, except diagnostic biopsy, within 28 days of the first administration of study drug. The subject must fully recovered from prior treatment before the first administration of study drug
• •15. Previous allogeneic stem cell transplantation or organ transplantation
• •16. Previous history of myocarditis, cardiomyopathy, and malignant arrhythmias
• •17. Vaccination within 4 weeks of the first administration of study drug and throughout the study is prohibited, except for administration of inactivated vaccines (eg, inactivated influenza vaccines).
• •18. All other underlying medical condition (including laboratory abnormalities) that is detrimental to study drug administration, or may affect drug toxicity or AE interpretation, or may result in inadequate or reduced adherence to study drug; Alcohol or drug abuse or dependence
• •19. Pregnancy or lactation
• •20. Concurrent participated in another therapeutic clinical trial