Using Biomarkers for Diagnosis, Risk Stratification of Post -Treatment Recurrence and Long-Term Surveillance of Lung Cancer

This study is an observational study of blood and tissue biomarkers. Investigators plan to evaluate the accuracy of lung cancer biomarkers found in the blood in determining if a lung nodule is cancer or benign. Investigators also plan to examine another biomarker found in the tumor tissue to identify participants after lung cancer surgery who have a high risk for recurrent cancer. Finally, investigators plan to determine if one of the blood-based biomarkers can be used to detect any late cancer recurrence.