RATIONALE: Estrogen can cause the growth of breast cancer cells. Hormone therapy using
tamoxifen citrate, goserelin acetate, leuprolide acetate, anastrozole, letrozole, or
exemestane, may fight breast cancer by lowering the amount of estrogen the body makes.
Everolimus may stop the growth of tumor cells by blocking some of the enzymes needed for
cell growth. It is not yet know whether hormone therapy is more effective when given with or
without everolimus in treating breast cancer.
PURPOSE: This randomized phase III trial studies how well giving hormone therapy together
with or without everolimus work in treating patients with breast cancer.