CD274 and neoplasm: Analysis of the association between molecular subtype and PD-L1 CPS revealed that Basal tumor types of classification schemes were more likely to be CPS ≥ 10: 52.2% of Basal and 82.1% of Claudin Low subtypes using the Decipher GSCv1 classifier21, 73.5% of the Basal/Squamous subtype using the ConsensusMIBC classifier11 (Fig. 3a), and 76.9% of the Basal Squamous subtype using TCGA were CPS ≥ 10.