Fig. 2

Identification of DEGs specifically expressed in GBM. a Clustering analyses were initially performed with the nine datasets in GBM vs. NG tissues. Each row represents the expression level of a mRNA, and each column represents a sample. “1” = glioblastoma, “0” = NG tissues. b The number of DEGs with the four different meta-analysis algorithms (maxP, fisher, roP and AW). c Venn diagram depicting the number of mRNAs that overlapped in GBM vs. NG, GBM vs. A, and GBM vs. NG tissues. GBM: glioblastoma; A: astrocytoma; OD: oligodendroglioma; NG: nonglioma; DEG: differentially expressed gene