Cancer is a disease that you can get. Cancer forms in your body when cells in your body get out of control. When you are healthy, your cells divide to help you grow and and keep you healthy. When you get cancer, your cells begin to do weird things. Cancerous cells outlive your regular cells and they still keep dividing and multiplying. When the cancerous cels divide and multiply they are making more cancerous cells. That is really BAD!! If you get more specific to the reasons why cancer forms, it forms because there is damage to your DNA. When you are healthy, your other cells usually repair your DNA if it is broken. In cancer ells, the DNA doesn't get fixed. When you get a high enough amount of cancerous cells, your cancer usually develops a tumor. A tumor is a swelling of a part of the body, generally without inflammation, caused by an abnormal growth of tissue. Not every kind of cancer develops tumors, leukemia doesn't. If you have a cancer that doesn't make a tumor then the cancer cells associated with these involve blood and organs that make blood. When you get cancer, it also doesn't just stay in one, single place. It travels to other parts of your body. When the cancerous cells move to other parts of your body they start to grow and replace the normal tissue that was there already. Depending on the type of cancer a person has, it will behave differently from other cancers. The rates that each cancer grows are all different from each other.
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