Cancer Caught on Video 6. New blood vessels (liver) previous | next This melanoma tumor is larger, about half a millimeter wide, or roughly the size of a tiny grain of sand. By this stage, the tumor needs to continuously attract new vessels to keep on growing. The normal liver tissue (lighter color) shows normal, healthy blood flow, and the tumor (darker color) shows new, angiogenic blood vessels with irregular shapes and blood flow, especially visible in the higher magnification clip. 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