Health Desk—Nov 10, 2017: A new study found breast cancer can resurface after remaining dormant for 15 years following successful treatment.
Women with large tumours and cancer that had spread to the lymph nodes had the highest 40% risk of it coming back.
Researchers writing in the New England Journal of Medicine said extending treatment with hormone therapy could reduce the risk of it recurring.
Scientists analysed the progress of 63,000 women for 20 years.
All had the most common form of breast cancer.
Women who originally had large tumours and cancer that had spread to four or more lymph nodes were at highest risk of the cancer returning the next 15 years, the study said.
Women with small, low-grade cancers and no spread to the lymph nodes had a much lower 10% risk of cancer spread over that time.