Definition of lung cancer: Cancer that forms in tissues of the lung, usually in the cells lining air passages. The two main types are small cell lung cancer and non-small cell lung cancer. These types are diagnosed based on how the cells look under a microscope.
Estimated new cases and deaths from lung cancer (non-small cell and small cell combined) in the United States in 2014:
- New cases: 224,210
- Deaths: 159,260
Information about treatment, including surgery, chemotherapy, radiation therapy, immunotherapy, and vaccine therapy