CD274 and neoplasm: Furthermore, on assessment of PD-L1 expression, 548 participants were found to have a PD-L1 combined positive score (the cumulative sum of PD-L1-positive cells detected in a sample divided by the total number of viable tumor cells in said sample, multiplied by 100) ≥ 1, and 317 participants were found to have a PD-L1 combined positive score ≥ 10 [40].