Some women with early-stage, low-risk breast cancer may not need radiotherapy after breast conserving surgery according to new research led by McMaster University, BC Cancer, Hamilton Heath Sciences, and the University of British Columbia.
The research, published in The New England Journal of Medicine on Aug. 17, shows women 55 or older with a specific subtype of Stage 1 breast cancer can be effectively treated with just surgery and endocrine therapy.
The subtype of breast cancer that researchers focused on - luminal A - represents up to 60 per cent of all breast cancers diagnosed annually and is associated with a lower risk of recurrence. With this new approach, a significant proportion of women can be spared of radiation after breast conserving surgery.
Related StoriesAt five years post-surgery, researchers found the recurrence of cancer in the breast was only 2.3 per cent without radiotherapy. This was roughly comparable with a 1.9 per cent risk of developing a new breast cancer in the other, untreated breast. The overall risk of cancer recurrence following breast-conserving surgery has decreased in recent years because of regular mammogram screening, improved surgical techniques and better systemic treatments, the authors say.
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