What is Cancer?


Cancer is the uncontrolled growth of abnormal cells anywhere in the body.

There are over 200 types of cancer; most fit into one of these categories: 
    • 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

The Canadian Cancer Society can provide you with more information on Cancer, view the Canadian Cancer Society's webpage.

The Canadian Cancer Society has developed a glossary that can help you understand many cancer-related words and phrases.
View the Canadian Cancer Society's Glossary



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