PAX5 and neoplasm: Remarkably, when PDL1 protein expression in tumor cells (PAX5 + PDL1 + , PDL1 + t) was analyzed, a significant increase in PAX5 + PDL1 + cells was observed in EBV+ cases (p = 0.0024, Kruskal Wallis, p = 0.0120 Mann–Whitney) (Fig. 4d, first column).