CCND1 and carcinoma: WT, wild type; T16, MMTV-cortactin mice; MP1, MMTV-cyclin D1 mice; T16*MP1, bitransgenic mice; wk, weeks; pregn, pregnancies; MG, mammary gland; d, diameter; cm, centimeter; HAN, hyperplastic alveolar nodules; MIN, mammary intraepithelial neoplasia; hyp, hypofyse enlargement (+); carc, carcinoma; IHC-, cortactin immunohistochemical staining negative; Y, yes; N, no; nd, not done.