Helmy Eltoukhy

Helmy Eltoukhy co-founded GRAIL and developed the Galleri multi-cancer early detection test based on cell-free DNA methylation profiling. His engineering and scientific work created the sequencing and machine learning infrastructure needed to detect methylation signatures of cancer-of-origin in plasma. The Galleri test can detect cancer signals from over 50 cancer types including many with no currently recommended screening test. His work represents a paradigm shift in cancer screening from organ-specific to blood-based multi-cancer approaches, with ongoing prospective validation in large clinical trials.