CNN1 and glioblastoma: Next, we evaluated the relationship between the expression of CNN1 and 47 immune checkpoint genes through the Sangerbox online platform and found that the expression of CNN1 correlated with GBM, OV, LUAD, LUSC, PRAD, BLCA, KIRP, LIHC, BRCA, COAD, SKCM, KIRC, THCA, HNSC, LAML, READ, LGG, KICH, ACC, PCPG, UVM, SARC, STAD, and DLBC; 47 immune checkpoint genes in tumors were strongly correlated.