What Is 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 lymph 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 that begins in melanocytes of the skin
is called melanoma.
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. There are a number of subtypes of
carcinoma, including adenocarcinoma, basal cell carcinoma, squamous
cell carcinoma, and transitional cell carcinoma.
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.
Updates on cancer continues for public awareness on
various types of cancer on this blog site, follow us every day for different
updates.
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