A, Multiparous WAP-ζ.neu mice (n=8) had a shorter mammary tumor onset latency compared to multiparous MMTV-neu mice (n=21). B, Virgin MMTV-ζ.neu mice (n=9) had a shorter mammary tumor onset latency compared to virgin MMTV-neu mice (n=22). C, Neu and HA-14-3-3ζ protein IB in mammary glands and tumors from WAP-ζ.neu, MMTV-ζ.neu and MMTV-neu mice. D, H&E of mammary tumors from MMTV-neu (DCIS), MMTV-ζ.neu and WAP-ζ.neu (invasive) mice (X100). E, Incidence of lung metastases in MMTV-ζ.neu (6/9) mice is higher than MMTV-neu (5/22) mice. Lung metastases H&E (X200).