Excision Biotherapeutics Inc.’s CEO is specific when he talks about his company’s therapies and what they may achieve: a functional cure. “When you treat someone and they become cancer free, you can’t use the world ‘cured’ because the cancer may come back decades later,” Daniel Dornbusch told BioWorld. “But you can talk about a  functional cure, meaning the cancer didn’t come back for a very long time. It’s functionally cured for maybe 10, 20 or 30 years."