Cancer manages to spread in the body using several methods. Metastasis happens when the cancerous cells reach other organs traveling through the bloodstream or through the lymphatic system and invade them, forming secondary tumors that start growing.

Cancer can also spread through angiogenesis, which is a process that consists in the formation of new blood vessels. Researchers are currently studying ways of blocking the angiogenesis and develop an anti-angiogenic medication, which is thought to be the key to slowing or even stopping the spread of cancer.