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Types of Cancer


Cancer is a term used for diseases in which abnormal cells divide without control and are able to invade other tissues. Cancer cells can spread to other parts of the body through the blood and lymphatic systems.

Cancer is not just one disease but many diseases. There are more than 100 different types of cancer. Most cancers are named for the organ or type of cell in which they start – for example, cancer that begins in the colon is called colon cancer.

Cancer types can be grouped into broader categories. The main categories of cancer include:

Carcinoma...................

cancer that begins in the skin or in tissues that line or cover internal organs.

Sarcoma......................

cancer that begins in bone, cartilage, fat, muscle, blood vessels, or other connective or supportive tissue.

Leukemia.....................

Cancer that starts in blood-forming tissue such as the bone marrow and causes large numbers of abnormal blood cells to be produced and enter the blood.

Lymphoma and........... Myeloma

Cancers that begin in the cells of the immune system.

Central nervous.......... system cancers

Cancers that begin in the tissues of the brain and spinal cord.

 

Origins of Cancer

All cancers begin in cells, the body’s basic unit of life. To understand cancer, it’s helpful to know what happens when normal cells become cancer cells.

The body is made up of many types of cells. These cells grow and divide in a controlled way to produce more cells as they are needed to keep the body healthy. When cells become old or damaged, they die and are replaced with new cells.

However, sometimes this orderly process goes wrong. The genetic material (DNA) of a cell can become 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.


A complete discussion of each type of cancer is provided in the "Patient Only" section of this website.


Mavis Cabral Medical Centre, P. O. Box 2259, St. John's, Antigua, West Indies
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