|General Cancer Information|
|Where does Cancer come from?|
|Who gets Cancer?|
I Where does Cancer come from?
All cancers originate in the cells, the body's basic unit of life. Knowing what happens when cells become cancerous is key to understanding cancer. The body is made up of many types of cells. These cells grow and divide in a controlled way to multiply into more cells. When cells become old or damaged, they die and are replaced with new cells. Sometimes, however, this orderly process goes wrong. The genetic material (DNA) of a cell can get damaged or changed, producing mutations that affect normal cell growth and division. When this happens, cells do not die when they should and new cells form when the body does not need them. The extra cells may form a mass of tissue called a tumor. Not all tumors are cancerous; tumors can be of two types.
Benign tumors - Benign tumors are not cancerous. They can often be removed, and, in most cases, do not come back. Cells in benign tumors do not spread to other parts of the body.
Malignant tumors - Malignant tumors are cancerous. Cells in these tumors can invade nearby tissues and sometimes spread to other parts of the body. The spread of cancer from one part of the body to another is called metastasis