In GBM, CD274 expression was positively correlated to HAVCR2, PDCD1LG2, and SIGLEC15, while that of CTLA4 correlated positively with HAVCR2, LAG3, TIGIT, PDCD1, PDCD1LG2, and SIGLEC15. This evidence concerns the gene CTLA4 and glioblastoma.