Cancer Caught on Video 4. Small Tumor previous | next This shows a very small metastatic cancer, early in its development. This is a melanoma tumor, so it appears black. It is growing around a blood vessel, and you can see its three-dimensional shape as the microscope focuses up and down through it. This small tumor still does not need to attract new blood vessels to support its growth, because the blood vessel that it surrounds can support its growth at this size. 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