How Does Cancer Spread to Other Parts of the Body?

Cancer Treatment - The cells within malignant tumors have the ability to invade neighboring tissues and organs, thus spreading the disease. It is also possible for cancerous cells to break free from the tumor site and enter the bloodstream, spreading the disease to other organs. This process of spreading is called metastasis.
When cancer has metastasized and has affected other areas of the body, the disease is still referred to the organ of origination. For example, if cervical cancer spreads to the lungs, it is still called cervical cancer, not lung cancer.
Although most cancers develop and spread this way - via an organ - blood cancer like leukemia do not. They affect the blood and the organs that form blood and then invade nearby tissues.