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 or cytologically confirmed invasive breast cancer. HER2 positive disease is not allowed. Metastatic breast cancer (Stage IV) is not allowed For patients entering the trial after neoadjuvant chemotherapy, there must be the presence of residual invasive disease on pathologic review following neoadjuvant chemotherapy. Residual disease is defined as a Miller-Payne response in the breast of 0-4 and/or residual carcinoma in one or more regional lymph nodes that would meet AJCC 7th edition for N1 N3 disease. The presence of DCIS without invasion does not qualify as residual disease. Alternatively, if Miller-Payne grading is not available, the patient will be eligible if the pathology report indicates any residual invasive carcinoma following neoadjuvant therapy If tumor is triple negative (ER-/PR-/HER2-) and the patient received neoadjuvant chemotherapy, disease may be clinical stage I-III pre-operatively, per AJCC 7th edition, based on baseline evaluation by clinical examination and/or breast imaging. Patients must have the presence of residual invasive disease on pathologic review following their neoadjuvant chemotherapy If tumor is triple negative and the patient did not receive neoadjuvant chemotherapy, there must be pathologic lymph node positivity and Stage IIB or greater disease after surgery. For the purposes of lymph node positivity can refer to either axillary or intramammary lymph nodes If tumor is hormone receptor positive, disease must be clinical Stage III neoadjuvantly, per AJCC 7th edition, based on baseline evaluation by clinical examination and/or breast imaging, or pathologic Stage IIB or greater at time of definitive surgery. Patients with hormone receptor positive breast cancer who do not receive neoadjuvant chemotherapy are not eligible for this protocol For patients who completed neoadjuvant chemotherapy, the regimen must contain an anthracycline, a taxane, or both. Patients who have received neoadjuvant therapy as part of a clinical trial are acceptable. Protocol therapy must be initiated < 180 days after last surgery for breast cancer. For triple negative patients who receive adjuvant chemotherapy only, the regimen must contain both an anthracycline and a taxane. For these patients, protocol therapy must be initiated < 28 weeks after initiation of adjuvant chemotherapy Patients with ER+ and/or PR+ breast cancer should receive adjuvant hormonal therapy No prior exposure to bevacizumab or other inhibitors of angiogenesis is allowed Patients must have completed definitive resection of primary tumor. Negative margins for both invasive and ductal carcinoma in situ (DCIS) are desirable, however positive margins are acceptable if the treatment team believes no further surgery is possible and patient has received radiotherapy. Patients with margins positive for lobular carcinoma in situ are eligible  Laboratory assessments as outlined in the protocol Stage IV breast cancer. Patients with metastatic disease are ineligible. However, specific staging studies are not required in the absence of symptoms Prior history of hypertensive crisis or hypertensive encephalopathy History if myocardial infarction or unstable angina within 12 months prior to registration History of stroke or transient ischemic attack at any time Significant vascular disease within 6 months prior to registration History of hemoptysis within 1 month prior to registration Ongoing or active infection NYHA Grade II or greater congestive heart failure Unstable angina pectoralis