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smoking - lung cancer facts
Definition of lung cancer:
Cancer that forms in tissues of
the lung, usually in the cells lining air passages. The two main types are small
cell lung cancer and non-small cell lung cancer. These types are diagnosed based
on how the cells look under a
microscope.
Lung cancer normally takes many years to develop. Incidence tends to peaks between the ages of 55 and 65 years. The changes in the lung however can begin almost as soon as a person is exposed to carcinogenic chemicals.
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The topics of smoking and lung cancer (primary carcinoma of the lung) are well documented. One of the most critical facts about lung cancer is that smoking is THE major cause. Tobacco smoke also causes chronic lung disease and contributes to cancer of the bladder, pancreas, and kidney.
Cancer Stages
Lung cancer normally takes many years to develop. Incidence tends to peaks between the ages of 55 and 65 years. The changes in the lung however can begin almost as soon as a person is exposed to carcinogenic chemicals.
Soon after exposure begins, a few abnormal cells may appear in the lining of the bronchi (the main breathing tubes). Gradually as you continue your exposure to these substances, more abnormal cells appear. Some will become cancerous and tumour forming.
If you stop smoking however, the risk of lung cancer decreases. Year on year, abnormal cells are replaced by normal cells. After ten years, the risk drops to a level that is one-third to one-half of the risk for people who continue to smoke. Quitting smoking greatly reduces the risk of developing other smoking-related diseases, such as heart disease, stroke, emphysema and chronic bronchitis but there are many more benefits to quitting smoking.
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