A number of microarray studies have described that Wilms' tumours resemble cells from the developing kidney around the MET stage, and found a clear distinction between the WT1/β-catenin mutant and wild-type subsets of tumours (Corbin et al., 2009; Dekel et al., 2006; Fukuzawa et al., 2009; Gadd et al., 2012; Li et al., 2002, 2004). Here, WT1 is linked to neoplasm.