If true, this is a most important finding, as the HER receptors–in particular HER2/neu–are of therapeutic and prognostic significance in breast cancer (Slamon, 1990; Meric et al, 2002; Hudelist et al, 2003; Witton et al, 2003; Abd El-Rehim et al, 2004; Bianchi et al, 2006). Here, ERBB2 is linked to breast cancer.