Epidermal Growth Factor Receptor (EGFR) Status Based Gefitinib Neoadjuvant Therapy in Non Small Cell Lung Cancer (NSCLC)

Inclusion Criteria: * Patients pathological diagnosed with NSCLC,with EGFR sensitive mutation; * Stage IIIA patients with technical operable disease evaluated by image and lab results; * Patients without chemotherapy or targeted-therapy before; * Inform Consent. Exclusion Criteria: * Patients with malignant tumor other than lung cancer; * Patients with other diseases such as cardiovascular disease that may hamper follow up; * Patients that may not coordinate well,judged by researcher.