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Browse 5,597 clinical trials for breast cancer. Find studies that match your criteria and connect with research centers.
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Showing 4301-4320 of 5,597 trials
NCT00766454
RATIONALE: Studying samples of urine and blood from patients with cancer in the laboratory may help doctors learn more about changes that occur in DNA and identify biomarkers related to cancer. PURPOSE: This study is looking at urine and blood samples in women with newly diagnosed breast cancer.
NCT00206492
The researchers want to learn whether ZD1839 can improve the activity of tamoxifen, a drug that participants will receive for the treatment of the type of breast cancer being studied. Tamoxifen medicine is part of the standard treatment for the type of breast cancer being studied. It is approved for the treatment of this problem. In order to help the researchers understand how the cancer responds to these medicines, the researchers will take a small tissue sample (biopsy) of the breast cancer before beginning treatment and after two weeks of treatment, at 6 weeks and when surgery is done as part of treatment for the cancer. If participants do not respond to treatment, another biopsy will be done to see why the participants did not respond. These samples will also be collected to look at different characteristics of the cancer. The researchers cannot and do not guarantee that participants will benefit if they take part in this study
NCT00764322
RATIONALE: Studying samples of blood from patients with cancer in the laboratory may help doctors learn more about differences in DNA and predict how well patients will respond to treatment and plan better treatment. PURPOSE: This clinical trial is studying blood samples from women with breast cancer or ductal carcinoma in situ who are receiving tamoxifen.