Grail's Multi-Cancer Blood Test Shows Mixed Results in Early Detection
Grail, a healthcare company based in Silicon Valley, has developed a $950 blood test called Galleri, designed to detect over 50 types of cancer early. The company presented its largest study at the American Society of Clinical Oncology meeting in Chicago, involving over 140,000 older participants in the UK. The study aimed to determine if the Galleri test could detect cancer before it reached advanced stages. While the test identified additional cancer cases, it missed a significant number, with a sensitivity of around 30%. The test is not yet FDA-approved but is available in the U.S. with a prescription. Despite its limitations, the test showed potential in detecting certain early-stage cancers, such as ovarian and esophageal cancers.