The decrease or loss of miR‐15b expression and the overexpression of Wee1 have been related to invasive growth or tumour stages in several human cancers (Allen and Weiss, 2010; Chung et al., 2010; Cimmino et al., 2005; Kreahling et al., 2012; PosthumaDeBoer et al., 2011; Ryu et al., 2010; Weirauch et al., 2013). This evidence concerns the gene WEE1 and cancer.