Despite the common belief in the oncology community that cancer research and treatment have focused on breast tumors that are estrogen receptor (ER)-positive, a researcher from The University of Texas M. D. Anderson Cancer Center maintains that clinicians have made "enormous strides" in treating patients with tumors that are ER-negative.
In a presentation at the annual meeting of the San Antonio Breast Cancer Symposium, Donald Berry, Ph.D., a professor and chair of the Department of Biostatistics and Applied Mathematics, looked at decades of breast cancer clinical trial experience and found that "the benefit of chemotherapy advances over the last 20 years to ER-negative patients has been surprisingly dramatic."
In examining the impact of chemotherapy treatment of node-positive breast cancer in three national clinical trials, which enrolled more than 6,000 patients cumulatively, Berry found that chemotherapy has reduced the risk of death in ER-negative patients by 56 percent. "The absolute benefit has been similarly impressive, especially in comparison with the corresponding absolute benefit of chemotherapy to ER-positive patients," he says.
Nancy Jensen | EurekAlert!
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