Some early-stage, low-risk breast cancer patients may not need radiotherapy after surgery

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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