PLK1 and cancer: Moreover, higher PLK1 expression levels were associated with more abundant B cell infiltration in 13 cancer types (LUSC, TGCT, ACC, STAD, ESCA, LIHC, HNSC, LGG, CESC, BRCA, LUAD, KICH, and PAAD) while were associated with fewer B cell infiltration in 5 cancer types (THCA, THYM, PRAD, KIRC, and UVM) (Spearman correlation, FDR<0.1) (Figure 1(b)).