EMT Drives Cancer Spread Through a Spectrum of Reversible Cell States
Epithelial-to-mesenchymal transition, or EMT, is a process where cancer cells shed their normal structure and gain the ability to invade surrounding tissue, evade the immune system, resist treatment, and spread to distant organs. For years, scientists viewed EMT as an on-off switch, but this review argues it is actually a continuous spectrum of shifting, reversible states. Each state along this spectrum gives tumor cells different capabilities, making cancers harder to treat. New technologies have uncovered surprising diversity in these EMT states across different cancer types, reshaping how researchers think about disease progression. The review synthesizes this emerging evidence and highlights both the challenges and new opportunities this understanding creates for developing more effective cancer therapies.