Cigarette smoking is known to be a cause of lung cancer. The risk of developing the disease increases with the number of cigarettes smoked particularly if the person starts to smoke at a young age. The person's risk of developing lung cancer may be reduced slightly if you smoke filtered and low tar cigarettes, but it is still far greater than that of a non-smoker. Lung cancer has always been more common in men, particularly those over the age of 40, as more men used to smoke than women. Considerably, there are a growing number of women having lung cancer since women have started smoking. About 90% of all lung cancer deaths among women are from smoking. The risk of lung cancer goes down quite quickly if the person stops smoking and after about fifteen years, the person's chances of developing the disease are similar to that of a non-smoker. Passive smoking or the breathing in other people's cigarette smoke, slightly increases the risk for lung disease and lung cancer, although the risk is still much less that if you smoke yourself.
Usually, the symptoms of lung cancer do not appear until the disease is in an advanced stage. Some are diagnosed early because they are found as a result of tests for other medical conditions. Screening examinations are done to detect a disease in people without symptoms of the disease. And since lung cancer usually spreads beyond the lungs before causing any symptoms, an effective screening program to detect the cancer early could save many lives. So far there is not screening test that has been shown to prevent the ill person from dying of the cancer. It has been concluded that the tests could not find many lung cancers early enough to improve a person's chances for a cure. Because of this, lung cancer screening is not a routine practice for the general public or even for people at increased risk like smokers.
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