Cancer Caught on Video 2. Escaping the bloodstream previous | next An early step in metastasis. This cancer cell has escaped from the bloodstream and is partly wrapped around the outside of a blood vessel. Because of this, it does not need to attract new blood vessels at this stage. previous | 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