Biomarkers in Predicting Response in Patients With Early-Stage Non-Small Cell Lung Cancer Previously Treated With Adjuvant Chemotherapy

This research trial studies prognostic and predictive markers in patients with early stage non-small cell lung cancer receiving chemotherapy. Prognostic markers are patient or tumor factors that predict patient survival independent of treatment. Predictive markers are factors that may influence and predict the outcome of treatment in terms of either response or survival benefit. Collecting and storing samples of tissue from patients with cancer to study in the laboratory may help doctors learn more about cancer and identify biomarkers related to cancer.