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 |  موضوع: ماهو السرطان؟....What is Cancer?  الخميس مارس 19, 2009 11:51 pm | |
| What is Cancer?If some
asked you to define cancer, could you do it? We all have heard the word
"cancer" many times, however very few people understand the disease and
how it develops. What is Cancer?
Cancer is a complex group of over 100 different types of cancer. Cancer can affect just about every organ in the human body. How Does Cancer Develop?
The organs in our body are made up of cells.
Cells divide and multiply as the body needs them. When these cells
continue multiplying when the body doesn't need them, the result is a
mass or growth, also called a tumor.
These growths are consider either benign or malignant. Benign is considered non-cancerous and malignant is cancerous.
Benign tumors rarely are life threatening and do not spread to other parts of the body. They can often be removed. How Does Cancer Spread to Other Parts of the Body?
The cells within malignant tumors have the
ability to invade neighboring tissues and organs, thus spreading the
disease. It is also possible for cancerous cells to break free from the
tumor and enter the blood stream, and spreading the disease to other
organs. This process of spreading is called stasis.
When cancer has stasized and has affected
other areas of the body, the disease is still referred to the organ of
origination. For instance, if cervical cancer spreads to the lungs, it
is still called cervical cancer, not lung cancer.
Although most cancers develop this way,
diseases like leukemia do not. They affect the blood and the organs
that form blood and then invade nearby tissues.
All cancers are different, and require
different treatment. What may be effective for prostate cancer,
probably will not be for bladder cancer. Diagnosing cancer will vary as
well, depending on the organ affected. Fast Facts About Cancer
* One in people will develop cancer.
* One in four people will die of cancer.
* In 2005, about 1.4 million new cases of cancer were diagnosed.
* More than 1500 Americans died each day of cancer this year.
* Over 1,000,000 cases of skin cancer will be diagnosed this year.
* Cancer is the leading cause of death among Americans under the age of 85. المصدر
About.com | |
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عالم المعرفه
Admin
عدد الرسائل : 573
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عرفت المنتدي ازاي؟ : اداره المنتدي
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تاريخ التسجيل : 05/08/2008
| | موضوع: رد: ماهو السرطان؟....What is Cancer? الخميس مارس 19, 2009 11:52 pm | |
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