- Adjuvant endocrine therapy: Patients with estrogen receptor- or progesterone receptor-positive disease receive adjuvant endocrine therapy beginning in approximately week 31. Premenopausal patients ≤ 40 years of age receive goserelin for 2-3 years and tamoxifen citrate for 5 years.Premenopausal patients > 40 years of age receive tamoxifen citrate for 5 years. Postmenopausal patients receive anastrozole for 5 years years.