We show that PD-L1 is not expressed by tumor cells in these tumors, which is a striking difference from two previous studies: Feng et al. reported PD-L1 tumor cell expression in 94.9% of their cases, as studied in tissue microarrays [9], while Zou et al. found PD-L1 expression by tumor cells in 68.5% of 54 cases studied, as reported in four different studies [10,11,13,14], and 66.7% in their validation series of 60 patients [12]. Here, CD274 is linked to neoplasm.