September 29, 2012

Causes of Lung Cancer


Smoke
Incidence of lung cancer is strongly associated with smoking, with approximately 90% of lung cancer arising as a result of tobacco use. The risk of lung cancer increases with the number of cigarettes smoked over time; doctors refer to this risk in terms of annual pack history of smoking (number of packets of cigarettes smoked per day multiplied by the number of years of exploitation).
For example, a person who has smoked two packs of cigarettes per day for 10 years have a history of 20 pack years. When the lung cancer risk increases even with a smoking history of 10 pack years, those with histories of 30 pack years or more are considered to have the greatest risk of developing lung cancer. Among the brands who smoke two packs or more cigarettes per day, one in seven will die of lung cancer.
Pipe and cigar smoking can also cause lung cancer, although the risk is not as high as with cigarette smoking. Where a person who smoked a pack of cigarettes per day had a risk of developing lung cancer is 25 times higher than the one who does not smoke, smokers, pipe and cigar smokers have a risk of lung cancer is approximately 5 times than someone who does not smoke.
Tobacco smoke contains over 4,000 chemical compounds, many of which have been shown to cause cancer, or carcinogenic. Two-carcinogenic carcinogenic tobacco smoke in the main are chemicals known as nitrosamines and polycyclic aromatic hydrocarbons. The risk of developing lung cancer decreases each year in line with smoking cessation as normal cells grow and replace damaged cells in the lung. In former smokers, the risk of developing lung cancer begins to approach that of a non-smoker for about 15 years after cessation of smoking.

Passive Smoking

Asbestos fibers (asbestos fibers) are the fibers of silicate (silicate fibers) that can persist for a lifetime in the lung tissue due to exposure to asbestos. The workplace is a source of exposure to asbestos fibers are common, due to asbestos used extensively in the past for both of these materials as thermal and acoustic insulation. Now, the use of asbestos is restricted or banned in many countries, including America. Both lung cancer and mesothelioma (a type of cancer of the pleura or lining of the abdominal cavity called the peritoneum) is associated with exposure to asbestos. Mehisap smoking dramatically increases the likelihood of developing a lung cancer associated with asbestos in exposed workers. Asbestos workers who do not smoke have a risk by five times to develop lung cancer than non-smokers and asbestos workers who smoke have a risk of 50 to 90 times greater than nonsmokers.

Radon Gas

Radon gas is a chemically inert gas and natural is a breakdown product of natural uranium. He cracked / crushed form products that emit a type of radiation that ionizes. Radon gas is a known cause lung cancer, with an estimated 12% of lung cancer deaths caused by radon gas, or 15.000 to 22.000 deaths associated with lung cancer every year in America, making radon the second leading cause of cancer lung in America. As with exposure to asbestos, smoking a very large simultaneous increase lung cancer risk with exposure to radon. Radon gas can move through soil and enter homes through gaps between the foundations, pipes, ducts, or other open spaces. The U.S. Environmental Protection Agency estimates that one out of every 15 homes in the United States contain levels of radon gas is dangerous. Radon gas is invisible and odorless, but it can be detected by the box is a simple test.

Family tendency

When the majority of lung cancers associated with tobacco smoke, the fact that not all smokers eventually develop lung cancer suggests that other factors, such as individual genetic sensitivity, may play a role in causing lung cancer. Many studies have shown that lung cancer is likely to occur in both brothers who smoke and who do not smoke who already have lung cancer than the general population. Recent studies have localized a region on the long arm of human chromosome number 6, which is likely to contain a gene that confers an increased susceptibility to develop lung cancer in smokers.

Lung Diseases

The presence of certain lung diseases, particularly chronic obstructive pulmonary disease (COPD), is associated with a slightly increased risk (four to six times the risk of a non-smoker) to develop lung cancer even after the effects of smoking cigarettes have been dispensed simultaneously.

Previous history of Lung Cancer

People who are survivors of lung cancer have a greater risk than the general population to develop a second lung cancer. People who are survivors of non-small cell lung cancers (NSCLCs, see below) have an additional risk of 1% -2% per year to develop a second lung cancer. In people who are survivors of small cell lung cancers (SCLCs), the risk of developing second cancers close to 6% per year.

Air Pollution

Air pollution from vehicles, industry, and places of power (electricity) can increase the likelihood of developing lung cancer in exposed individuals. Up to 1% of lung cancer deaths are caused by breathing polluted air, and experts believe that prolonged exposure (long) at very high polluted air may carry a risk similar to that of passive smoking to develop lung cancer.
Posted by at
Labels:

Causes of Lung Cancer


Smoke
Incidence of lung cancer is strongly associated with smoking, with approximately 90% of lung cancer arising as a result of tobacco use. The risk of lung cancer increases with the number of cigarettes smoked over time; doctors refer to this risk in terms of annual pack history of smoking (number of packets of cigarettes smoked per day multiplied by the number of years of exploitation).
For example, a person who has smoked two packs of cigarettes per day for 10 years have a history of 20 pack years. When the lung cancer risk increases even with a smoking history of 10 pack years, those with histories of 30 pack years or more are considered to have the greatest risk of developing lung cancer. Among the brands who smoke two packs or more cigarettes per day, one in seven will die of lung cancer.
Pipe and cigar smoking can also cause lung cancer, although the risk is not as high as with cigarette smoking. Where a person who smoked a pack of cigarettes per day had a risk of developing lung cancer is 25 times higher than the one who does not smoke, smokers, pipe and cigar smokers have a risk of lung cancer is approximately 5 times than someone who does not smoke.
Tobacco smoke contains over 4,000 chemical compounds, many of which have been shown to cause cancer, or carcinogenic. Two-carcinogenic carcinogenic tobacco smoke in the main are chemicals known as nitrosamines and polycyclic aromatic hydrocarbons. The risk of developing lung cancer decreases each year in line with smoking cessation as normal cells grow and replace damaged cells in the lung. In former smokers, the risk of developing lung cancer begins to approach that of a non-smoker for about 15 years after cessation of smoking.

Passive Smoking

Asbestos fibers (asbestos fibers) are the fibers of silicate (silicate fibers) that can persist for a lifetime in the lung tissue due to exposure to asbestos. The workplace is a source of exposure to asbestos fibers are common, due to asbestos used extensively in the past for both of these materials as thermal and acoustic insulation. Now, the use of asbestos is restricted or banned in many countries, including America. Both lung cancer and mesothelioma (a type of cancer of the pleura or lining of the abdominal cavity called the peritoneum) is associated with exposure to asbestos. Mehisap smoking dramatically increases the likelihood of developing a lung cancer associated with asbestos in exposed workers. Asbestos workers who do not smoke have a risk by five times to develop lung cancer than non-smokers and asbestos workers who smoke have a risk of 50 to 90 times greater than nonsmokers.

Radon Gas

Radon gas is a chemically inert gas and natural is a breakdown product of natural uranium. He cracked / crushed form products that emit a type of radiation that ionizes. Radon gas is a known cause lung cancer, with an estimated 12% of lung cancer deaths caused by radon gas, or 15.000 to 22.000 deaths associated with lung cancer every year in America, making radon the second leading cause of cancer lung in America. As with exposure to asbestos, smoking a very large simultaneous increase lung cancer risk with exposure to radon. Radon gas can move through soil and enter homes through gaps between the foundations, pipes, ducts, or other open spaces. The U.S. Environmental Protection Agency estimates that one out of every 15 homes in the United States contain levels of radon gas is dangerous. Radon gas is invisible and odorless, but it can be detected by the box is a simple test.

Family tendency

When the majority of lung cancers associated with tobacco smoke, the fact that not all smokers eventually develop lung cancer suggests that other factors, such as individual genetic sensitivity, may play a role in causing lung cancer. Many studies have shown that lung cancer is likely to occur in both brothers who smoke and who do not smoke who already have lung cancer than the general population. Recent studies have localized a region on the long arm of human chromosome number 6, which is likely to contain a gene that confers an increased susceptibility to develop lung cancer in smokers.

Lung Diseases

The presence of certain lung diseases, particularly chronic obstructive pulmonary disease (COPD), is associated with a slightly increased risk (four to six times the risk of a non-smoker) to develop lung cancer even after the effects of smoking cigarettes have been dispensed simultaneously.

Previous history of Lung Cancer

People who are survivors of lung cancer have a greater risk than the general population to develop a second lung cancer. People who are survivors of non-small cell lung cancers (NSCLCs, see below) have an additional risk of 1% -2% per year to develop a second lung cancer. In people who are survivors of small cell lung cancers (SCLCs), the risk of developing second cancers close to 6% per year.

Air Pollution

Air pollution from vehicles, industry, and places of power (electricity) can increase the likelihood of developing lung cancer in exposed individuals. Up to 1% of lung cancer deaths are caused by breathing polluted air, and experts believe that prolonged exposure (long) at very high polluted air may carry a risk similar to that of passive smoking to develop lung cancer.