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In the united states the 5-year survival rate for cancer overall is currently health quizlet9/26/2023 ![]() This slide from the National Cancer Institute shows the sites of many of the more common cancers that people have, mostly as adults. For example, cancer that begins in the colon is called colon cancer and cancer that begins in melanoctyes of the skin is called melanoma. Most cancers are named for the organ or type of cell in which they start. Different Kinds of Cancer Cancer is not just one disease but as many as 100 diseases or more. The abnormal tissue growths or tumors can be: Benign (not cancer), where the growths are not life-threatening, don't invade surrounding tissues or spread, and can usually be removed and rarely grow back or they can be Malignant (which is when they're called cancer), where the growths can be life-threatening, can invade surrounding tissues and spread to other organs (a process called metastasis), and can often be removed but sometimes grow back. Sometimes extra cells grow without dying or replacing and, in turn, then form masses of tissue known as growths or tumors. In cancer, the cells grow uncontrollably. You probably know that when normal cells in a body grow old or become damaged, they either die off or get replaced by a process called apoptosis. What is Cancer? According to the National Cancer Institute (NCI) of the National Institutes of Health, cancer is a term used for more than 100 different diseases in which abnormal cells divide without control and are able to invade other tissues.
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