CSNK1E and ovarian cancer: Furthermore, our data add ovarian cancer to the growing list of malignant tumours that shows upregulation of CKIε expression in cancer compared to control normal tissues (Brockschmidt et al, 2008; Firestein et al, 2008; Frierson et al, 2002; Kim et al, 2010; Yang & Stockwell, 2008).