RATIONALE: Collecting and storing samples of sputum and tissue to study in the laboratory may help doctors identify biomarkers related to cancer. PURPOSE: This research study is looking samples of sputum and tissue from lung cancer patients, participants at high risk for developing lung cancer, and from healthy volunteers (both smokers and non-smokers).
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Development of a cost-effective, high-throughput, and non-invasive screening test using Fourier transform infrared technology for detection of early lung cancer in sputum of high-risk people
Discovery and characterization of novel metabolic biomarkers in sputum samples that permit detection of lung cancer at pre-cancerous and early lung cancer stages