HMGA2 and cancer: HMGA2 is usually undetectable in normal adult somatic cells (Gattas et al., 1999; Rogalla et al., 1996), but is expressed in embryonic tissues (Gattas et al., 1999; Rogalla et al., 1996) and embryonic stem (ES) cells (Droge and Davey, 2008), and re‐expressed in cancer (stem) cells (Fusco and Fedele, 2007; Yu et al., 2007).