CD8A and neoplasm: Interestingly, the PD-L1 tumor cell (TC) score (corresponding to expression of PD-L1 evaluated by immunohistochemistry on tumor cells from pretreatment tumor biopsy) (p = 0.045), the count of CD8+ cells (p = 0.023) and the total body weight (p = 0.038) were statistically different between the two clusters.