Only about 15% of lung cancers are diagnosed in the early stages when lung cancer is more likely to be cured with surgical treatment. Early detection is key to effective treatment.
Ninety percent of lung cancers are caused by smoking. Smoking is by far the largest contributing factor for lung cancer. Someone who has smoked for 30-40 years is 20-40 times more likely to develop lung cancer.
Ten percent of lung cancers occur in people who have never smoked. These lung cancers can be caused by other risk factors, including previous lung disease, exposure to asbestos, radon gas, or prolonged contact with other environmental toxins.