Smoking is, by far, the biggest risk factor for developing lung cancer. The longer you smoke - including tobacco in any form - and the more you smoke, the greater your risk. Approximately 87 percent of all lung cancers are attributable to long-term smoking or passive exposure to smoke (also known as second-hand smoke). A non-smoker who is married to a smoker is 30 percent more likely to develop lung cancer than the spouse of a non-smoker.
It's important to note, however, that not every individual diagnosed with lung cancer has a history of smoking. Although not every cause of lung cancer is known, the disease seems to be associated with the following risk factors:
- Long-term history of smoking
- Long-term exposure to second-hand smoke
- Exposure to radon (an odorless, radioactive gas that can develop concentrated levels indoors and damage lung tissue)
- Exposure to asbestos (significantly increased when exposed individuals have a history of smoking)
- Occupational exposure to certain industrial chemicals (e.g., uranium, arsenic, vinyl chloride, etc.)
- Air pollution (may slightly increase an individual's chances of getting lung cancer)
- History of radiation treatment to the chest (e.g., treatment for Hodgkin's disease or breast cancer) (significantly increased in smokers)
- Radiation exposure from occupational, medical, and/or environmental sources
- Personal and family history (If you have had lung cancer, you have a higher risk of developing another lung cancer. First-degree relatives of lung cancer patients may have a slightly higher risk of acquiring lung cancer themselves.)
- Diet (Some studies have suggested that a diet low in fruits and vegetables may increase the chances of getting cancer if you are chronically exposed to tobacco smoke.)
- Past history of smoking
We are here for education, support and to help you navigate your way through your diagnosis, treatment and recovery.

Call (925) 947-3322.
If you stop smoking before a cancer develops, you significantly reduce your risk of developing lung cancer. However, former smokers remain at greater risk for lung cancer than people who have never smoked.
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