The PD-L1 expression rate (>1%) of DOG-1+ tumour cells was significantly higher in the IM-PD/SU-treated group (29.0%, 9/31) compared to TKI-naive (5.0%, 1/20) and IM-PD (6.7%, 2/30), respectively (p = 0.02) (Supplementary Table 2). This evidence concerns the gene CD274 and neoplasm.