CCND1 and breast cancer: Our results proved genotype of CCND1 A870G not correlated with breast cancer risk as in other malignancies [11-15]; more promising, stratified analysis showed GG genotype of CCND1 A870G playing a protective role for triple-negative breast cancer (Table 4), as with early onset (<55 years), early menarche (<12.2 years) and/or premenopausal (<49 years) Taiwanese women (Table 3).