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Breast Cancer Survival Rates Increased by Radiation Therapy After Mastectomy

by Kathy Jones on June 4, 2010 at 10:33 PM
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 Breast  Cancer  Survival Rates Increased by Radiation  Therapy After Mastectomy

A new study has found that postmastectomy radiation therapy (PMRT) improves breast cancer survival rates.

PMRT for some breast cancer patients can lower recurrence risk by nearly 30 percent and increase their five-year overall survival by almost 50 percent, according to the research.

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Researchers retroactively studied 544 patients with T1-2 N1 invasive breast cancer who were treated with modified radical mastectomy between April 1991 and December 2005.

Of the patients, 383 did not receive radiation therapy and 161 did.

Radiation therapy reduced the risk of recurrence in patients who were younger than 40 years old, T2 stage, high nuclear grade, had negative estrogen receptor status and had presence of lymphovascular invasion from 40 percent to 12.5 percent and increased the overall survival of T1 N1 breast cancer patients with negative estrogen receptor status and presence of lymphovascular invasion from 43.7 percent to 87.1 percent.
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Lead author Po Sheng Yang, a physician in the Sun Yat-Sen Cancer Center Department of Surgery in Taipei, Taiwan, said: "Even though the study sample size was small, we feel that the results are compelling.

"Based on this study, we strongly suggest that radiation therapy be used after mastectomy for this particular group of breast cancer patients."

The study appears in the International Journal of Radiation Oncology*Biology*Physics, the official journal of the American Society for Radiation Oncology (ASTRO).

Source: ANI
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