Lung cancer – Causes And Risk Factors
Why a human develops lung cancer is, as with most cancers, not fully understood. However, there are factors that can increase the risk of developing a lung tumor.
Tobacco smoke is the most important risk factor for the development of lung cancer : up to 90 percent of all malignant lung tumors are due to smoking.
About one in ten smokers suffer from lung cancer during their lifetime, on average 30 to 40 years after the onset of tobacco use.
The longer and the more smoked, the greater the risk of lung cancer. In the meantime, about 50 substances have been identified in tobacco smoke that are known to cause cancer. These are transformed or degraded by various metabolic processes.
Passive smoking also increases the risk: in women by 24 percent and in men by 37 percent, because in the so-called sidestream smoke is still a variety of pollutants included.
About one percent of all lung cancer cases are caused by the inhalation of harmful substances in the workplace.
In the first place asbestos stands, but also arsenic, beryllium, cadmium, chromium, nickel, aromatic hydrocarbons and diesel exhaust gases play a role. 3 These substances are mainly used in metalworking, coal and coke production, foundries or rubber production.
Lung cancer patients should therefore talk with their doctor about any recognition as an occupational disease if they were exposed to these substances in their workplace. Heavy air pollution, especially from diesel soot, can also increase lung cancer risk by 1.5 times.