HOTAIR and glioblastoma: High expression levels of H19 (HR = 1.002, p < 0.001), HOTAIR (HR = 1.017, p < 0.001), miR-222 (HR = 1.325, p < 0.001), miR148A (HR = 1.109, p < 0.001), GMNC (HR = 1.036, p = 0.008) and HMGA2 (HR = 1.011, p = 0.048) were significantly associated with a worse prognosis, and the high expression of PCDHGB4 (HR = 0.0.973, p = 0.006) and MBP (HR = 0.951, p = 0.019) was significantly associated with a better prognosis in GBM and LGG patients (Figure 6A).