Study to Evaluate NA-NOSE for Monitoring and Detecting Recurrence in Early Stage Lung Cancer

PRIMARY OBJECTIVES: I. Determine if a suitable fraction of patients become NA-NOSE negative within three years post treatment. We will test the hypothesis that this fraction is at most 30% versus the alternative that it is at least 50%. SECONDARY OBJECTIVES: I. Determine if patients who become NA-NOSE negative post treatment then become NA-NOSE positive prior to clinical recurrence. II. Estimate the time post treatment needed to become NA-NOSE negative. III. Estimate the lead time gained between a negative to positive NA-NOSE transition and clinical recurrence. OUTLINE: Patients undergo breath sample collection for the NA-NOSE breath test at baseline (2 pre-treatment samples), and post treatment samples at regularly scheduled follow up visits, for 2 years in the absence of disease progression.