Cancer cell invasion and metastasis.

@article{Liotta1992CancerCI,
  title={Cancer cell invasion and metastasis.},
  author={Lance A. Liotta},
  journal={Scientific American},
  year={1992},
  volume={266 2},
  pages={54-9, 62-3}
}
The most life-threatening aspect of cancer is the undetected spread of tumor cells throughout the body. Improved understanding of how these cells invade tissues is leading to new treatments.