Patients receive FOLFIRI (iritecan 180mg/m2, leucovorin 400mg/m2, fluorouracil 400mg/m2 bolus, fluorouracil 2400mg/m2 46-48 hours), anti-PD-1 antibody (Nivolumab 240mg, or Pembromab 200mg, or Terriprizumab 240mg), and bevacizumab (5mg/kg)….Anti-PD-1 antibody plus bevacizumab and FOLFIRI demonstrated promising activity as second-line treatment for patients with MSI-H metastatic colorectal cancer.