Lung cancer is the growth of cancer cells that are not controlled in the lung tissue that can be caused by a number of environmental carcinogens, especially cigarette smoke.
The main causes:
Smoking is the main cause of approximately 90% of cases of lung cancer in men and about 70% in women. The more cigarettes smoked, the greater the risk for suffering from lung cancer.
Only a small proportion of lung cancer (about 10% -15% in men and 5% in women) are caused by substances that met or inhaled in the workplace. Working with asbestos, radiation, arsenic, chromate, nickel, klorometil ethers, mustard gas and coke oven emission can cause lung cancer, although usually only occurs in workers who also smoked.
The role of air pollution as a cause of lung cancer is still unclear. Some cases occur because of exposure by radon gas in the household.
Sometimes lung cancer (particularly adenocarcinoma and alveolar cell carcinoma) occur in people who have lung scarring due to a lung disease, such as tuberculosis and fibrosis.
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