CD274 and renal pelvis/ureter urothelial carcinoma: In this context, a recent study of UTUC used a similar cutoff value (230 × 109/L),41 although other studies have indicated that thrombocytosis (>400 × 109/L) was associated with adverse clinicopathological features and a poor prognosis in cases of UTUC42 or urinary bladder UC.43 However, this cutoff value was not realistic in the present study, as only a few patients had both PD‐L1 positivity and a platelet count of >400 × 109/L.