The GBM dataset consisted of 69 samples and 15 genes (IDH1, PTEN, FGFR1, EGFR, NF1, RB1, TP53, PIK3R1, PIK3R2, PIK3CA, PIK3CB, PIK3C2G, FGFR3, PIK3C2A, ATRX). This evidence concerns the gene PIK3C2A and glioblastoma.