As shown in Figure 3A, analysis of overall survival (OS) demonstrates that a low expression level of ABCG2 was linked to poor prognosis for the cancer types of adrenocortical carcinoma (ACC) (p = 0.030), glioblastoma multiforme (GBM) (p = 0.048), and KIRC (p < 0.001) within the TCGA project. This evidence concerns the gene ABCG2 and glioblastoma.