Lifetime Risk of Developing Cancer: Approximately 38.5 percent of people will be diagnosed with cancer of some kind will at some point during their lifetime, based on 2012-2014 data. Prevalence of This Cancer: In 2014, there were an estimated 14,738,719 people living with cancer of any site in the United States.
Cancer is the uncontrolled growth of abnormal cells in the body. Cancer develops when the body's normal control mechanism stops working. Old cells do not die and cells grow out of control, forming new, abnormal cells. These extra cells may form a mass of tissue, called a tumor.
Cancer can start when just one cell begins to grow and multiply too much. This causes a growth called a tumor.
There are over 100 different cancer diseases in which cells begin to grow out of control. Cancer can start anywhere in the body. You can surgically remove infected body parts to get rid of the disease. Some cancers can be treated with drugs