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): 18.0-75.0,  HER2-Positive Breast Cancer • Histologically or cytologically confirmed HER2 positive invasive breast carcinoma Clinical stage #-#B Patients must have measurable disease as defined by palpable lesion with both diameters ≥2cm measurable with caliper and/or a positive mammogram or ultrasound with at least one dimension ≥2cm. Bilateral mammogram and clip placement is required for study entry. Baseline measurements of the indicator lesions must be recorded on the Patient Registration Form. To be valid for baseline, the measurements must have been made within the 14 days if palpable. If not palpable, a mammogram or MRI must be done within 14 days. If palpable, a mammogram or MRI must be done within 2 months prior to study entry. If clinically indicated, xrays and scans must be done within 28 days of study entry Eastern Cooperative Oncology Group(ECOG) performance status 0 to 1 within 14 days of study entry Normal (greater than 50%) left ventricular ejection fraction (LVEF) by echocardiography Signed informed consent Adequate organ function within 2 weeks of study entry: Absolute neutrophil count >1500/mm3, Hgb >9.0 g/dl and platelet count >100,000/mm3 Total bilirubin < upper limit of normal Creatinine < 1.5 mg/dL or calculated cranial cruciate ligament (CrCL) >50mL/min using the Cockcroft Gault equation serum glutamate oxaloacetate transaminase(SGOT)(AST) or serum glutamic oxaloacetic transaminase(SGPT)(ALT) and Alkaline Phosphatase must be within the range allowing for Patients must be over 18 years old Women of childbearing potential must have a negative serum pregnancy test performed within 7 days prior to the start of treatment Women of childbearing potential and men must agree to use adequate contraception (barrier method of birth control) prior to study entry and for the duration of study participation  • Metastatic disease Prior chemotherapy, hormonal therapy, biologic therapy, investigational agent, targeted therapy or radiation therapy for current breast cancer. Patients with history of breast cancer greater than 5 years from initial diagnosis are eligible for the study. Patients may not have received anthracycline-based chemotherapy in the past. Patients with history of ductal carcinoma in situ(DCIS) are eligible if there were treated with surgery alone History of previous or current malignancy at other sites with the exception of adequately treated carcinoma in-situ of the cervix or basal or squamous cell carcinoma of the skin. Patients with a history of other malignancies, who remain disease free for greater than five years are eligible