Furthermore, higher PD-L1 in tumor tissues was related to shorter cancer-specific survival (CSS) in radically resected UTUC patients (HR = 1.63, 95% CI = 1.17-2.26, <i>I</i> <sup>2</sup> = 0.0%), but was not associated with overall survival (OS) (HR = 1.49, 95% CI = 0.76-2.91, <i>I</i> <sup>2</sup> = 74.9%). Here, CD274 is linked to renal pelvis/ureter urothelial carcinoma.