PD-1 Antibody Combined With COX Inhibitor in MSI-H/dMMR or High TMB Colorectal Cancer

"BAT1306 100mg /pembrolizumab 200mg on day 1 + aspirin 200mg oral (celebrex 400mg oral when there is contraindication to aspirin) on day 1-21 every three weeks~Contraindication to aspirin :~Allergic or intolerance to aspirin; With peptic ulcers; With hemophilia or other bleeding tendencies; Have the gentic disease glucose-6 phosphate dehydrogenase deficiency."