CD274 and glioblastoma: On the contrary, Hh activity was positively correlated with PD‐L1 expression at the transcriptional level in 78.6%(11/14) TCGA cancer types (BRCA, CESC, GBM, HNSC, KIRC, KIRP, LIHC, LUAD, LUSC, PAAD, and UCEC).