GRAIL's NHS-Galleri Trial Shows Significant Reduction in Stage IV Cancer Diagnoses
GRAIL, Inc. has announced the results of its NHS-Galleri trial, presented at the 2026 American Society of Clinical Oncology (ASCO) Annual Meeting. The trial, conducted in collaboration with NHS England, evaluated the Galleri multi-cancer early detection (MCED) test. Over three years, the trial involved 142,250 participants aged 50 to 77. The results showed a 22% reduction in Stage IV cancer diagnoses in the second screening round and a 26% reduction in the third round. The Galleri test increased cancer detection rates four-fold when added to standard screening, and reduced emergency cancer diagnoses by 25%. The trial aims to detect cancers earlier, potentially allowing for curative treatment.