HOXA9 and glioblastoma: We also demonstrated that WNT6 and HOXA9 cooperate in activating the WNT/β‐catenin signaling pathway in GBM (Fig. 6), suggesting WNT6 and the WNT/β‐catenin signaling pathway as effectors of HOXA9‐mediated aggressiveness in GBM (Costa et al., 2010; Pojo et al., 2015).