To be familiar with the disease we must first understand how a cell develops a carcinogen elsewhere in the body. The cell matures like all other living things in that it is born, grows, reproduces and ultimately dies. The cells reproduce by dividing in the process called mitosis, in which one stem cell forms two daughter cells. Normal cells divide just for wound repair or to replace those that were lost or died, then stop dividing. In comparison, cancer is an abnormal and continuous multiplication of cells. The cells divide uncontrollably, forming masses and growing from the surrounding areas and spread along with other parts of the body, this activity is known as metastasis.
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