Strikingly, PD‐L1KO RT4 cells failed to establish subcutaneous tumors in NSG mice although control RT4 cells grew well (clone 2 data, Figure 4E with similar results using clone 5), supported by the in vitro data suggesting that RT4 cells are more dependent on tumor cell‐intrinsic PD‐L1 growth signals versus MB49 cells. Here, CD274 is linked to neoplasm.