(A) Distribution of sources of circRNAs identified between glioma and NBT. (B) Distribution of length of altered circRNAs between glioma and NBT. (C) Chromosome distribution showing the numbers of up- and down-regulated circRNAs located in different chromosomes. (D) Hierarchical clustering showing a distinguishable expression pattern of circRNAs between glioma and NBT. (E) Volcanic maps showing a distinguishable expression pattern of circRNAs between glioma and NBT. (F) The level of hsa_circ_0007694, hsa_circ_0008016, hsa_circ_0076931, and hsa_circ_0076948 in glioma and NBT was examined by qRT-PCR (n=6, *P<0.05).