Breast cancer breakthrough uses molecular data to predict whether tumours will come back

For breast cancer survivors, the risk of tumours returning casts a long shadow, with recurrence possible up to two decades after a diagnosis. But new research could help identify and treat those most in danger.Doctors have traditionally relied on factors such as the size and grade of a tumour at diagnosis, lymph node involvement and a patient’s age to determine their risk of relapse.But the rate at which breast cancer recurs, and why it does so, remains “poorly understood”, according to the…

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