HOXA9 and central nervous system cancer: To validate the association of WNT6 and HOXA9 in the clinical setting, the expression of these two genes was analyzed by qRT‐PCR in our cohort of glioma patients from HB, Portugal (n = 31; Fig. 4A), and by RNAseq data in three additional larger independent cohorts (TCGA, n = 672; Bao, n = 274; and Gill, n = 75; Fig. 4B–D).