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LUNG CANCER 101: DISEASE OVERVIEW

Source: www.lungcancer.org
Topic: Lung
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Sort Desciption: Lung cancer is the uncontrolled growth of abnormal cells in one or both of the lungs. While normal lung tissue cells reproduce and develop into healthy lungs, these abnormal cells reproduce rapidly and never grow into normal lungs. ...

Content Inside:
The Condition

Lung cancer is the uncontrolled growth of abnormal cells in one or both of the lungs. While normal lung tissue cells reproduce and develop into healthy lungs, these abnormal cells reproduce rapidly and never grow into normal lungs. Lumps of cancer cells (tumors) then form and disrupt the lung, making it difficult for the lung to function properly.

More than 87 percent of lung cancers are smoking related. However, not all smokers develop lung cancer. Smoking cessation reduces an individualâ s risk significantly, although former smokers remain at greater risk for lung cancer compared to people who never smoked. Exposure to other carcinogens such as asbestos and radon gas also increase an individualâ s risk, especially when combined with cigarette or cigar smoking.

Types

The two main types of lung cancer are non-small-cell (about 80 percent of all cases) and small- cell (about 20 percent of all cases). The names refer to the types of cell that make up the tumor, rather than its size. Non-small-cell lung cancer (NSCLC) is classified into three subtypes: adenocarcinomas (found in the mucus glands), squamous or epidermoid carcinoma (located in the bronchial tubes), and large-cell carcinoma (found near the surface).

Lung cancer almost always begins in one lung and, if left untreated, can spread to lymph nodes or other tissues in the chest, including the other lung. Lung cancer can also metastasize (or spread) throughout the body, to the bones, brain, liver, or other organs.

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