postmenopausal women of any age

requiring surgery for early invasive primary breast cancer (clinically stage I or II; T1-T3; N0-1; M0), with estrogen receptor-positive tumor(s)

body mass index between 18 and 2 kg/m2, inclusive

must be willing to give voluntary written informed consent.

A Study to Investigate the Effects of Tibolone (Livial®) on Breast Tissue in Postmenopausal Women With Breast Cancer (Study 32971)(P06469)