Lung Cancer Essay

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Lung Cancer United States Asia Europe Lung Cancer It is estimated that in 2013 that there is over two hundred and twenty eight thousand new cases of lung cancer diagnosed in the United States. There are an estimated four hundred thousand people in the United States currently with lung cancer. (National Cancer Institute, n.d.) Lung cancer is the most common cancer in the world and is the leading cause of cancer death in the United States. Cancer is defined as a disease that is caused by uncontrolled division of abnormal cells in a part of a body. Lung cancer is caused primarily from smoking. The more a person smokes and the earlier that person started smoking, the more likely they are to develop lung cancer. (Medline Plus, 2013) Smoking causes cancer by damaging tissue. Cigarettes are full of carcinogens (cancer causing substances).When cigarette smoke is inhaled, changes in the lung tissue begin immediately. In the beginning the body can repair most if not all of the damage, however over time, normal cells become increasingly damaged. This causes the cells to act abnormally which is the cause of cancer. (Mayo Clinic, 2012, para. 2) High levels of pollution, radiation, and asbestos exposure can also increase the risk of lung cancer. Some lung cancers can develop spontaneously with no medical history. There are 2 main types of lung cancer; small cell cancer and non-small cell cancer. Small cell cancer occurs almost exclusively in heavy smokers and is less common then non-small cell cancer. Non-small cell cancer is and “umbrella” term for several types of lung cancer that behave in a similar way. These include; squamous cell carcinoma, adenocarcinoma, and large cell carcinoma. (Mayo Clinic, 2012, para. 3) Some of the symptoms of lung cancer are: a cough that doesn’t go away and gets worse over time, shortness of breath, wheezing, repeated pneumonias, loss

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