Amiddle-aged client with a 30-year history of smoking was diagnosed with lung cancer. a health history revealed previous exposure to air pollution, asbestos, and radiation. which factor most likely had the greatest impact on development of the lung cancer?

Asbestos will most likely had the greatest impact on the development of lung cancer.

Explanation:

RISK FACTORS FOR LUNG CANCER:

Tobacco smoke : Cigar smokers & Pipe smokers mostly causes lung cancer.Smoking low tar  cigarette also increases lung cancer risks. People who consumes menthol cigarettes also have an equal risks because menthol is inhaled deeply.Radon exposure : Radon is naturally occurring radioactive gas  that cause from the uranium breakdown in rocks and soils. For eg. Homes & other buildings in United states also have higher radon levels.Asbestos exposure : People  who work with asbestos ( i.e. mills, mines, textile plants & shipyards) are more likely die of lung cancer. When they were exposed  to large quantity of asbestos,they develop mesothelioma ( cancer of pleura).Consumption of dietary supplements : Smokers who take beta carotene supplements had an increasing risk of lung cancer.Second hand smoke : If a person does not smoke, but if he inhale  or take breath in the smoke of others, it can increase the risk of developing lung cancer. It is thought to cause more than 7000 deaths each year from lung cancer.

TREATMENT OF LUNG CANCER :

TherapyTargeted TherapyCombination of these treatments

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