Cancer Caught on Video 1. Early metastasis next This sequence shows an early step in the spread of a cancer (a process called metastasis). A breast cancer cell has traveled in the bloodstream and has arrived at the liver, where it stops because it is too big to keep moving through the tiny blood vessels to get to another organ. The cell appears bright because it has been labeled with a fluorescent dye to help identify it. next Watch the Program Here | Dr. Folkman Speaks | Cancer Caught on Video Designing Clinical Trials | Accidental Discoveries | How Cancer Grows Help/Resources | Transcript | Site Map | Cancer Warrior Home Editor's Picks | Previous Sites | Join Us/E-mail | TV/Web Schedule About NOVA | Teachers | Site Map | Shop | Jobs | Search | To print PBS Online | NOVA Online | WGBH © | Updated February 2001