Fig. 1: A subset of MSS and MSI mCRC patients responded to immunotherapy.

a Overview of the study design. b Progression-free survival (PFS) of systemic chemotherapy and immunotherapy in 16 microsatellite stable (MSS) distant mCRC patients, including 8 responded (R) patients and 8 non-responded (NR) patients. c PFS of immunotherapy in 9 microsatellite instable (MSI) CRC patients, including 5 R patients and 4 NR patients. d Representative CT images of MSS/MSI_R and NR patients.