WNT6 and melanoma: Moreover, WNT6 and HOXA9 were not only co‐expressed in glioma (Fig. 4), but also in leukemia, a cancer type where the oncogenic roles of HOXA9 are well established (Armstrong et al., 2002; Esposito et al., 2015; Kroon et al., 2001; Lawrence et al., 1999), and also in TGCT, CHOL, and melanoma (Fig. 5 and Table 1).