Neoadjuvant Herceptin in Patients With Breast Cancer

Inclusion Criteria: All patients must be female. Informed consent must be signed. Women with locally advanced breast cancers or primary breast cancers with concomitant gross metastatic disease are eligible. Locally advanced cancers must be of clinical and/or radiologic size > 4 cm, and/or are deemed surgically inoperable. Her2/neu overexpressing tumors defined as HercepTest score of 3+, or >/= one-third of invasive tumor showing membranous staining, or fluorescence in situ hybridization (FISH) positive. Negative serum pregnancy test (bHCG) within 7 days of starting study, if of child-bearing potential. Kidney and liver function tests - all within 1.5 times of the institution's upper limit of normal. Performance status (World Health Organization [WHO] scale) < 2 and life expectancy > 6 months. Age > 18. No metastatic disease without concomitant primary breast cancer. No previous or current malignancies at other sites within the last 5 years, with exception of adequately treated cone-biopsied in situ carcinoma of the cervix uteri and basal or squamous cell carcinoma of the skin. Exclusion Criteria: Pregnancy or unwillingness to use a reliable contraceptive method in women of child-bearing potential. Severe underlying chronic illness or disease. Cardiomyopathy or baseline left ventricular ejection fraction (LVEF) < 50%. Patients on other investigational drugs while on study. Severe or uncontrolled hypertension defined as blood pressure (BP) > 180/100 on three separate occasions. History of congestive heart failure. History of coronary arterial disease.