There was also no difference in CR rate between groups with different PD-L1 protein expression levels (72% CR in tumours with PD-L1 positivity versus 71% in tumours with ‘less than positive’ PD-L1 IHC; p = 1.00) and MHC-I expression (71% CR in positive MHC-I expression versus 74% in less-than-positive expression; p = 1.00) or MHC-II expression (77% CR in tumours positive for MHC-II versus 70% in less-than-positive expression; p = 0.60) in the whole cohort of patients. Here, CD274 is linked to neoplasm.