Cancer occurs when normal cells growth goes out of control. Normally when a cell dies a new cell is born to take its place and the normal cell and dead ones are equal. When cancer occurs there is a disruption of the balance of normal and dead cells. This cause the cells to grow uncontrollably, or cause the cells to undergo cell suicide this happens through a process called “apoptosis.” This is the process that old cells usually destroy themselves (Kleinsmith, Kerrigan, Kelly and Hollen, 2004 p.5). Cancers are classified as either a
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