A SIMPLE test could help boost survival for thousands of young women with one of the deadliest forms of breast cancer.
The test will show if the most common forms of chemotherapy will be effective for patients with so-called triple-negative tumours.
It means those who are not likely to benefit can be immediately switched to an alternative treatment, boosting their survival chances.
The test could revolutionise care for the 8,000 women diagnosed with the aggressive triple negative tumours every year, researchers hope.
The cancers account for one in six cases and kill a quarter of sufferers in five years.
Patients have a nine in ten chance of being alive after three years if they respond to chemo.
But their chances of dying are 2½ times higher if the first course of treatment is ineffective.
The research, funded by Breast Cancer Now, has identified a protein in the tumour which indicates whether the chemo will work.
Scientists at Queen’s University Belfast are developing a test.
Baroness Delyth Morgan, of Breast Cancer Care and Breast Cancer Now, said: “This is promising.”