CD274 and neoplasm: However, we did not reveal PD-L1 expression in tumour cells, PD-1 expression in TILs and TIL scores to be predictive markers of pCR except for TIL scores in patients with TNBC, which our group also reported previously.13 PD-L1 expression in tumours marginally correlated with pCR in HR−/HER2+ tumour, although not significantly.