More than 220,000 Americans are diagnosed with lung cancer each year. There are two main types of lung cancer: small cell (SCLC) and non-small cell (NSCLC). NSCLC is the most common type of lung cancer, affecting 85 to 90 percent of all lung cancer patients. It tends to be less aggressive than SCLC, which means treatment is oftentimes more successful.

Although smoking is one of the greatest risk factors for lung cancer, NSCLC can be caused by other environmental factors. These include air pollutants, radon, and arsenic found in drinking water. A family history also puts you at a greater risk. But if the cancer if detected and treated early, your chances of living a fairly healthy and normal life are optimistic.