Cancer is a disease that occurs in the bloodstream that affects growth and there are more than 100 types of cancer.

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Cancer affects the body when the cells divide. They are uncontrollable and form lumps of tissues called tumors (except in the case of cancer, blood, blood function and cell division). Tumors that can overwhelm the digestive system, the nervous system, the circulatory system, and can release hormones that alter the function of the body. Tumors that remain in one spot and show limited growth are generally considered to be of the benign type

Severe and dangerous tumors occur when two conditions are met

1 - move a cell around the body with the use of blood or lymphatic systems may destroy healthy tissues and call the invasion.

2 - The cell can be withdrawn, which makes the new blood vessels self-lubricating in the process of naming the blood vessels.

As the American Cancer Society said, the most common deaths in the United States are caused by cancer

WHO says there are 14 million new cancer cases and 8.2 million cancer-related deaths in 2012.