CD274 and neoplasm: 687/2676 (26%) cases were considered PD-L1-positive if at least ≥1% of tumor cells were stained [8,13,27,29,35,36,37,38,39,41,42,43,54,62,66,67,74,75,77,78,79,84], while 93/1062 (9%) PCs were counted as positive for ≥5% of stained tumor cells [17,39,43,57,66,94,98,99,100,120].