What is Angiogenesis and how can Thermography pick up on its activity for early warning signs of tumors and breast cancer? Angiogenesis is defined as the formation of new blood vessels. Angiogenesis plays a critical role in the growth of cancer because solid tumors need a blood supply if they are to grow beyond a few millimeters in size. Tumors can actually cause this blood supply to form by giving off chemical signals that stimulate angiogenesis. The resulting new blood ves