AR and breast cancer: In addition, expression of the androgen receptor (AR) has also been frequently noted, suggesting that androgens may also play a role in breast cancer biodynamics (Soreide et al, 1992; Isola, 1993; Kuenen-Boumeester et al, 1996; Brys et al, 2002; Moinfar et al, 2003; Ogawa et al, 2008).