The results showed that the arm−level gain and high amplification of CDK2 in GBM was negatively (p < 0.05) associated with B-cell, macrophages, CD4+ T cell dendritic cell infiltration (Supplementary Figure S5), while CDK4 SCNAs showed no or weak relationship with infiltration of the above six immune cell types. Here, CDK2 is linked to glioblastoma.