CD274 and neoplasm: Furthermore, radioconjugate accumulation was significantly higher in PD-L1-expressing U87-MGvIII tumours than in PD-L1-negative H292PD-L1KO (6.5 ± 0.9%ID/g vs. 0.7 ± 0.2%ID/g, p < 0.0001, Figure 2C).