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ASCO: Emerging trends in radiation therapy for women over 70 with early stage breast cancer
Date:6/2/2011

Patterns of radiation usage in breast conserving therapy for women 70 years and older with stage I breast cancer are changing: more women are opting for radioactive implants and those with estrogen positive tumors are opting out of radiation therapy, according to an abstract being presented at the American Society of Clinical Oncology annual meeting in Chicago by Thomas Jefferson University Hospital researchers on Saturday, June 4. The abstract (#6094) received an ASCO Merit Award.

In another abstract (#1037), the researchers report that women with estrogen negative tumors were 91 percent more likely to die from breast cancer if they did not receive radiation therapy after a lumpectomy.

Given the relatively recent developments in radiation therapy (i.e., an increased use of brachytherapy and external beams) and data supporting the idea that radiation isn't necessary for women with estrogen positive tumors, researchers wanted to see how actual practice patterns were impacted.

Researchers found that there was a modest increase in the percentage of women with estrogen receptor positive cancers who did not get radiation therapy starting around 2004, and increasing use of radioactive implants, such the MammoSite, Contura, Savi or similar devices, since 2002.

There was also a corresponding drop in women who received external beam radiation, according to Xinglei Shen, M.D., a resident in the Department of Radiation Oncology at Thomas Jefferson University Hospital. "Among women with estrogen receptor negative cancers, there was not the same increase in frequency of women who did not get radiation, but there was an increased use of radioactive implants," he said.

The consequence of those findings was determining what impact omitting radiation has on survival. While there is data that the omission of r
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Contact: Steve Graff
stephen.graff@jefferson.edu
215-512-1783
Thomas Jefferson University
Source:Eurekalert

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