Nicholas E. Navin, PhD (Nadia’s Gift Foundation Damon Runyon-Rachleff Innovator '13-'15) and colleagues at M.D. Anderson Cancer Center, Houston, developed a single cell sequencing tool (NUC-SEQ) that can measure genome-wide mutations in individual cancer cells. This study revealed that different subtypes of breast cancer have varied tumor diversity, and that different tumor cells grow at dramatically different speeds. These findings may have important implications for the diagnosis and treatment of breast cancer. This work was published in the journal Nature.