CD274 and neoplasm: It does not correlate strongly with pCR (although the rate of pCR was doubled in PD-L1-positive tumours compared to PD-L1-negative tumours), but only with EFS, with 66% of patients with PD-L1-positive tumours being event-free at 1 year upon chemo-immunotherapy (versus 55% for PD-L1 negative) [14].