Causes of Lung Cancer

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The incidence of lung cancer strongly correlates with cigarette smoking with about 90% of all lung cancer cases attributed to smoking exposure. The risk of lung cancer directly relates to the number of cigarettes smoked and the time during which smoking has occurred. Environmental exposure to asbestos fibers, radioactive radon gas, and air pollution also increase one’s risk of developing lung cancer. Lastly, familial predisposition, presence of certain lung diseases, and prior history of lung cancer account for the remaining rare causes of lung cancer.