A new breast cancer test could detect women who are less likely to respond to a standard breast cancer treatment – and could help improve treatment for these women by giving them other treatment options earlier.

Treating some women with higher risk breast cancer with a longer course of hormonal therapy before surgery led to more changes in the genetic makeup of their tumours, some of which were associated with better survival outcomes.

Scientists have used artificial intelligence to recognise patterns in breast cancer – and uncovered five new types of the disease, each matched to different personalised treatments.