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Cancers are so dangerous and life threating because cancerous cells have the ability to metastasize. Metastasis is the process in which tumor or cancer spreads to different parts of the body other than its original site. In metastasis, cancer cells break away from where they first formed, travel though the blood of the lymph system and form new tumors in other parts of the body such as organs. Metastasis occurs in a series of steps:

• Metastasis begins when the cancer cells begin growing into or invading normal tissue that’s nearby or close to its location

• The cancer cells then move through the walls of lymph nodes and blood vessels close by

• The cancer cells began traveling through the lymphatic system and the blood stream, which allows it to reach other parts of the body.

• Once the cancer cells are in the blood stream, it seeps into small blood vessels in far locations and begin to invade the blood vessel walls and into surrounding tissue

• After the cancer cells reach the tissues, tiny tumors form in these tissues

• The cancer cells in these tissues cause new blood vessels to grow, which is supplying the tumors with blood, enabling them to continue growing and spreading.

 

 

Once the metastasis process of cancer beings the cancer becomes hard to contain and control. Depending on the state of the cancer, there are severe different ways to treat cancer as well as ones that are in metastatic stages.