<qa>  What is the name of the new method that allows us to look at how the patients cancerWe, the investigators at Baylor Breast Care Cancer, are doing this study to learn how well Taxotere makes tumors become smaller. We are also doing this study to find out how well Taxotere treats the type of breast cancer that some patients have. We are asking patients to take part in this study because they have locally advanced breast cancer. Women with this breast cancer will usually receive chemotherapy medicines to reduce or shrink the cancer before surgery to take out the cancer. If patients choose to take part in this study, they will receive Taxotere and the combination of cyclophosphamide and doxorubicin. These medicines are part of the standard good medical care for this type of breast cancer. They are approved for the treatment of this problem. To help us learn how the patients cancer responds to these medicines, we will take a small tissue sample biopsy of the patients breast cancer before beginning treatment, one day after the first dose of treatment, once each week for the first three weeks of treatment, and when surgery is done as part of treatment for their cancer. These samples will be collected also to look at the biology of the patients cancer. We will also use a new method called cDNA array technology, which lets us look at thousands of genes coding information inside the cancer cell at once. By looking at different genes in the breast cancer, we may learn important information about which cancers will respond to a chemotherapy medicine. We hope to learn if there are different gene patterns in patients whose tumors shrink or do not shrink with this chemotherapy medicine. This information may help us, in the future, to choose the right medicines for women with breast cancer so that they have the highest chance of their cancer shrinking with chemotherapy medicine. We cannot and do not know if patients will benefit if they take part in this study. 