New blood test predicts breast cancer recurrence years in advance

A new blood test can predict breast cancer recurrence 3 years before tumors are detectable, offering hope for improved long-term treatments. The test detects circulating tumor DNA, identifying relapse on average 15 months after the test, with the longest period being 41 months. In a trial, all 11 relapsed patients were successfully identified among 78 participants, showing promising early detection potential.