CD274 and esophageal cancer: There were no significant differences in the OS or DFS for both PD-L1-positive and PD-L1-negative esophageal cancers with or without MSI/dMMR (P = 0.936 and P = 0.883 for PD-L1 positivity; P = 0.141 and P = 0.070 for PD-L1 negativity).