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قديم 05-03-2011, 12:17 PM
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افتراضي

Lung Cancer.

There are two kinds of cancer that can affect the lungs. Non-small cell cancer and small cell cancer. They are identified by how they look under a microscope, and are distinguishable by how they grow and spread. Treatment programs differ, depending on which cancer a person has. First, Non-small cell lung cancer is more common than small cell cancer, and grows and spreads more slowly. This cancer is divided into three types. They are named after the cells affected squamous cell carcinoma, Aden carcinoma and large cell carcinoma. Second, Small cell lung cancer, also sometimes referred to as oat cell cancer, is less common than non-small cell cancer. It will often spread to other parts of the body, creating secondary tumors. The causes for lung cancer have been identified through research. Most of them involve the use of tobacco and cigarette. Cigarette smoke contains many carcinogens, as well as a whole host of other toxins. The smoke which is breathed into the lungs damages the cells, and over time, those cells can become cancerous. The factors which appear to influence whether a person will develop lung cancer are, age of the person when he/she started to smoke, how long the person has smoked, number of cigarettes smoked per day, how deeply the smoke is inhaled. Finally, quitting smoking will greatly reduce the chance of a person getting lung cancer




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