Dr Cynthia Lim

CAUSES OF LUNG CANCER
The cause of lung cancer is not clear, but a link has been found between several factors and this malignancy.
► TO***co:
To***co is the leading cause of lung cancer. Lung cancer rates increase with the number of years smoked and the number of ci******es smoked per day. Lung cancer rates in smokers are much higher. 90% of lung cancer cases are in smokers.
In to***co smoke, there are more than 40 substances capable of causing cancer, which are polycyclic aromatic Hydrocarbures (such as: 3-4 Benzopyrene, Dibenzanthracene), Polonium 40 and Selenium in cigarette paper. Active smoking increases the risk of lung cancer by 13 times. Long-term passive smoking also increases the risk.
► AIR POLLUTION:
Due to combustion in homes and businesses, steam is emitted from the engines.
► CAREER:
Workers working in some nickel mines, radioactive mines... or working in some petrochemical, gas, plastic industries... have a higher risk of lung cancer.
► Genetics:
Unproven but there may be familial involvement in some gene mutations.
► bronchial diseases:
Old scars of lung lesions.
+ Old pulmonary tuberculosis: many cases of lung cancer developing on old TB scars have been detected.