Previous studies have had inconsistent results for an association of the CCND1 A870G polymorphism with bladder cancer (Cortessis et al, 2003; Wang et al, 2003b; Berman et al, 2004; Ito et al, 2004), endometrial cancer (Kang et al, 2005), breast cancer (Grieu et al, 2003; Krippl et al, 2003; Shu et al, 2005), head and neck cancer (Zheng et al, 2001), gastric and oesophageal cancer (Wang et al, 2003c; Zhang et al, 2003a), hepatocellular carcinoma (Zhang et al, 2003b), lung cancer (Qiuling et al, 2003), and prostate cancer (Koike et al, 2003; Wang et al, 2003a). Here, CCND1 is linked to breast carcinoma.