Chemotherapy Less Effective Among Women Over 80 Years With Breast Cancer

by Dr. Trupti Shirole on  August 13, 2015 at 5:59 PM Cancer News
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Chemotherapy refers to the use of medicines to treat cancer. A new study has revealed that the chances of survival due to chemotherapy are significantly lower for women over the age of 80 years with breast cancer.
 Chemotherapy Less Effective Among Women Over 80 Years With Breast Cancer
Chemotherapy Less Effective Among Women Over 80 Years With Breast Cancer

Lead author Xianglin Du, professor at The University of Texas Health Science Center at Houston, US, said, "Chemotherapy's reduced effect on the risk of mortality in older breast cancer patients could be due to several factors- tumors being less sensitive to chemotherapy, a decrease in dosage as the body gets weaker with age or chemotherapy killing healthy cells in addition to cancer cells."

For the study, the research team examined data on 14,440 women diagnosed with breast cancer and 26,893 men and women diagnosed with colon cancer from 1992-2009. All patients were over the age of 65 years. Among the women who had breast cancer, chemotherapy treatment reduced the risk of death from all causes by 30% for women ages 65 to 69, 26% for women ages 70 to 74 and 24% for women ages 75 to 79. However, for women over the age of 80, chemotherapy did not significantly reduce the risk of mortality.

It was observed that when women over the age of 80 years with breast cancer combined chemotherapy and an additional treatment with the drugs adriamycin and cyclophosphamide, they experienced a 29% reduced mortality risk. While the benefit of chemotherapy in reducing the risk of mortality decreased with age for female breast cancer patients, it was seen that men and women with colon cancer did not experience the same trend. Chemotherapy remained effective for colon cancer patients until the age of 89 years.

The study appeared in the Journal of American Geriatrics Society.

Source: IANS

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