RecruitingStudying Tumor Tissue Samples and Blood Samples to Learn More About DNA Changes in Patients With Lung CancerRATIONALE: Studying samples of tumor tissue and blood from patients with cancer in the laboratory may help doctors learn more about changes that occur in DNA and identify biomarkers related to cancer. PURPOSE: This laboratory study is looking at tumor tissue samples and blood samples to learn more about DNA changes in patients with lung cancer.