Blood test hints at breast-tumour response to treatment

RESEARCH HIGHLIGHT 30 April 2026 A biomarker shows which people with certain types of breast cancer are more likely to respond to an immune-based therapy. Breast tumours (pictured, tumour cells, artificially coloured) can shrink in people who take a therapy that stimulates T cells. Credit: Steve Gschmeissner/Science Photo Library Immunologists have developed a blood-based biomarker that can predict a person’s response to breast-cancer treatment1. Access options Access Nature and 54 other Nature Portfolio journals Get Nature+, our best-value online-access subscription $32.99 / 30 days cancel any time Subscribe to this journal Receive 51 print issues and online access $199.00 per year only $3.90 per issue Rent or buy this article Prices vary by article type from$1.95 to$39.95 Prices may be subject to local taxes which are calculated during checkout Additional access options: Log in Learn about institutional subscriptions Read our FAQs Contact customer support doi: https://doi.org/10.1038/d41586-026-01353-7 Subjects Latest on: Cancer The news is not all bad: five inspiring science stories to lift your mood News 01 MAY 26 Long-lived immune cells show promise against cancer in world-first trial News 30 APR 26 Evolutionary characterization of lung cancer metastasis Article 29 APR 26