Patient description: The patient is a 42 year-old postmenopausal woman who had a screening sonogram which revealed an abnormality in the right breast. She had no palpable masses on breast exam. Core biopsy was done and revealed a 1.8 cm infiltrating ductal breast carcinoma in the left upper outer quadrant. Lumpectomy was done and the surgical margins were clear. The tumor was HER2-positive and ER/PR negative. Axillary sampling revealed 1 positive lymph node out of 12 sampled. CXR was unremarkable. She is using “well women” multivitamins daily and no other medication. She smokes frequently and consumes alcohol occasionally. She is in a relation with only one partner and has a history of 3 pregnancies and live births. She breastfed all three children.

Clinical trial eligibility criteria: eligible ages (years): 18.0-999.0,  Breast Cancer Histologically confirmed, American Joint Committee on Cancer (AJCC) stage II or III breast cancer High risk of breast cancer recurrence, defined as documented evidence of one or more of the following i) Biopsy evidence of breast cancer in regional lymph node(s) (LN) (node-positive disease); Nodal micrometastases only are not considered node positive ii) Tumor size > 5 cm (T3) or locally advanced disease (T4) Documented pathological evaluation of the breast cancer for hormone receptor (estrogen receptor [ER] and progesterone receptor [PR]) status and HER-2 status Subjects must be receiving or be scheduled to receive standard of care systemic adjuvant or neoadjuvant chemotherapy and/or endocrine therapy and/or HER-2 targeted therapy For subjects receiving adjuvant therapy only subjects must have undergone complete resection of the primary tumor with clean surgical margins, or subjects must have undergone resection of the primary tumor and be scheduled for further treatment of the primary tumor with curative intent. Definitive treatment must be planned to be completed within approximately 9 months of randomization Time between definitive surgery and randomization must be ≤ 12 weeks. Definitive surgery may secondary interventions (e.g. to clear inadequate surgical margins) Subjects with node positive disease must have undergone treatment of axillary LN with curative intent, or subjects must be scheduled for further treatment of regional lymph nodes with curative intent. Definitive treatment must be planned to be completed within approximately 9 months of randomization Subjects must not have received prior neoadjuvant treatment. Endocrine treatment for less than 30 days prior to surgery is not considered prior neoadjuvant treatment For subjects receiving neoadjuvant therapy only  Prior or current evidence of any metastatic involvement of any distant site History of breast cancer (other than ductal carcinoma in situ [DCIS] or lobular carcinoma in situ [LCIS]) prior to the current diagnosis Osteoporosis requiring treatment at the time of randomization or treatment considered likely to become necessary within the subsequent six months Any prior or synchronous malignancy (other than breast cancer), except i) Malignancy treated with curative intent and with no evidence of disease for ≥ 5 years prior to enrollment and considered to be at low risk for recurrence by the treating physician ii) Adequately treated non-melanoma skin cancer or lentigo maligna without evidence of disease Active infection with Hepatitis B virus or Hepatitis C virus Known infection with human immunodeficiency virus (HIV) Prior history or current evidence of osteomyelitis/osteonecrosis of the jaw Active dental or jaw condition which requires oral surgery Planned invasive dental procedure for the course of the study Non-healed dental or oral surgery