CD274 and cancer: Higher PD-L1 on tumor cells was related to shorter cancer-specific survival (CSS) in patients (HR = 1.578, 95% CI = 1.227-2.029, <i>I</i> <sup>2</sup> = 23.3%), but had no associations with overall survival (OS) (HR = 1.123, 95% CI = 0.511-2.465, <i>I</i> <sup>2</sup> = 0.0%).