In comparison with expression levels of lncRNAs in low grade glioma, CYTOR and MIR155HG were significantly over-expressed in GBM tissues, while three lncRNAs (LINC00641, AC120036.4, PWAR6) were remarkably down-regulated in GBM samples (Fig. S3A-C). Here, MIR155HG is linked to central nervous system cancer.