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What causes lung cancer?

ANSWER

Smoking is the biggest reason. It’s responsible for about 85% of all cases.  Some genetic glitches may put some people at higher risk. Secondhand tobacco smoke is also a cause. People who live with someone who smokes are 20% to 30% more likely to get lung cancer than those who live in a smoke-free home. The risk is also higher in people that have pulmonary fibrosis or HIV infection."

SOURCES: 

National Cancer Institute. 

National Institutes of Health. 

WebMD Medical Reference from the American College of Physicians: “Section 12 VIII Lung Cancer.”

Reviewed by Jennifer Robinson on August 28, 2020

SOURCES: 

National Cancer Institute. 

National Institutes of Health. 

WebMD Medical Reference from the American College of Physicians: “Section 12 VIII Lung Cancer.”

Reviewed by Jennifer Robinson on August 28, 2020

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What affects your risk for lung cancer?

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