Expression of PCIF1 had a significant difference in 25 of 28 tumor types like adrenocortical carcinoma (ACC), breast invasive carcinoma (BRCA), colon adenocarcinoma (COAD), glioblastoma multiforme (GBM), kidney chromophobe (KICH), and prostate adenocarcinoma (PRAD) (p < 0.01), while no statistic difference in the rest of tumor types (p > 0.05) (Figures 1A, B). This evidence concerns the gene PCIF1 and glioblastoma.