Is Radiation Therapy A Necessity?
|Sunday, 28 November 2010|
A standard treatment for early-stage breast cancer is to remove the tumor via lumpectomy and then follow that with radiation therapy and the drug, tamoxifen. But a report presented at the 2010 annual meeting of the American Society of Clinical Oncology (ASCO) has called this approach into question. Researchers at Massachusetts General Hospital, Boston, studied women over the age of 70 who had estrogen receptor positive (ER+) tumors that were removed by lumpectomy. The subjects were randomly assigned to receive either tamoxifen alone or tamoxifen plus radiation therapy.
The authors themselves concluded that "the addition of radiation does not impact survival, distant disease free survival, breast cancer specific survival or breast conservation" (Hughes 2010).
The Web site Breastcancer.org states that "these results shouldn't be used to make treatment decisions for women younger than 70." Fair enough. But many readers are bound to wonder whether radiation is worthwhile for women under the age of 70. That wasn't addressed in this study. Radiation's main purpose after breast surgery is to prevent recurrences, and it does a pretty good job at that. However, its impact on survival is not as great as some people suppose. Even the authoritative Perez and Brady textbook refers to "the lack of survival benefit associated with breast irradiation…." Needless to say, a lot of questions remain about the actual survival benefit of radiation therapy, including some indications for which it is now commonly used.
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