While cigarettes are by far the most important cause of lung cancer, chemicals and other on-the-job hazards "play a remarkable role" in lung cancer risk.
5% of lung cancers in men are job-related. Men in the known to be risky occupations were 74% more likely to have been diagnosed with lung cancer.
The strongest associations were seen for ceramic and pottery jobs and brick manufacturing, as well as for those working in manufacturing of non-iron metals.
A CXR shows a right upper lobe (RUL) mass due to lung cancer. Source: Finger Clubbing due to Lung Cancer. Clinical Cases and Images.
References:
http://www.reuters.com/article/idUSTRE61E53920100215
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