Blood test that detects tumor DNA could help guide treatment when cancer has spread

MedicalXpress | Mai 16, 2026

A blood test that detects tumor DNA circulating in the bloodstream may help select the most effective treatment options for cancer patients whose tumors have started to spread, according to one of the largest randomized controlled trials of its kind presented at the Congress of the European Society for Radiotherapy and Oncology (ESTRO 2026).