Cigarette smoking is known to be the cause of most lung cancers. The risk of the disease increases with the number of cigarettes smoked. Filtered and low tar cigarettes may reduce the risk slightly, but it is still far greater than that of a non-smoker. If a person stops smoking, the risk of lung cancer goes down quite quickly, and after about fifteen years their chances of developing the disease are similar to that of a non-smoker. It now known that breathing in other people's cigarette smoke, known as passive smoking, slightly increases the risk of lung disease and cancer, although the risk is still much less than if you smoke yourself. Although pipe and cigar smokers have a lower risk of lung cancer than cigarette smokers they are at a much greater risk than non-smokers. In some families, smokers may be more likely to develop lung cancer due to a faulty gene.
             Lung cancer is the uncontrolled growth of abnormal cells in the lung. Normal lung tissue is made up of cells that create lungs. Sometimes the cells mess up are affected by the tar in cigarettes and that cell reproduce wildly, without takeing the correct shape and function of a lung. That reproduction can form tumors that clog up the lung and make it stop functioning as it should. Because of the large size of the lungs, cancer may grow for many years without anyone knowing. It's even known that lung cancer can spread outside the lungs without causing any symptoms.
             Lung cancer is one of the most common cancers that a smoker can get. At this time, over half of the lung cancer cases in the United States are in men, but the number found in women is increasing and will soon equal that in men.Also Smokers aren't the only ones that get cancer but the chances raises incredlbly if you smoke.
             There are a few symptoms Lung cancer may cause like a cough which is one of the more common ones and is likely to happen when a tumor grows and blocks an air passage to your lungs. An...