More than 8 out of 10 lung
cancers are caused by smoking.3 Tobacco smoke contains carcinogens—substances that cause cancer. These substances damage lung cells, and over time the damaged cells can turn into lung cancer.
The more you smoke and the longer you have smoked, the higher your chances of getting lung cancer. You lower your chances when you quit or cut down on how much you smoke.
A few people get lung cancer after being exposed to other
harmful substances, including
asbestos, radioactive dust,
radon, or radiation such as X-rays.
Cancer also may be caused by gene changes (mutations) that occur as you get older.
In this article
This information is produced and provided by the National
Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National
Institute via the Internet web site at http://
.gov or call 1-800-4-CANCER.
WebMD Medical Reference from Healthwise
September 19, 2013
This information is not intended to replace the advice of a doctor.
Healthwise disclaims any liability for the decisions you make based on this