This randomized trial studies transdermal or oral telapristone acetate in treating patients undergoing surgery to remove the breast (mastectomy). Telapristone acetate may help prevent breast cancer from forming in premenopausal women. Giving telapristone acetate transdermally may be safer and have fewer side effects than oral administration.
Telapristone Acetate, Placebo, Laboratory Biomarker Analysis, Questionnaire Administration
BRCA1 Mutation Carrier, BRCA2 Mutation Carrier, Ductal Breast Carcinoma In Situ, Lobular Breast Carcinoma In Situ, Stage 0 Breast Cancer, Stage IA Breast Cancer, Stage IB Breast Cancer, Stage IIA Breast Cancer, Stage IIB Breast Cancer