PD-L1 and CD8 mRNA expression profiling analysis revealed that micronodular type, type B3, and thymic carcinoma were correlated with higher PD-L1 mRNA expression (Figure 3D); moreover, type A (atypical) and thymic carcinoma were correlated with lower CD8 mRNA expression (Figure 3C). This evidence concerns the gene CD8A and thymic carcinoma.