Inclusion Criteria:  Suspected or proven non-small cell lung cancer (NSCLC) clinical stage I and II (diameter > 1 cm and less than 5 cm, no pleura invasion) clinical N0M0 (8th TNM) All patients have to be staged by total body CT scan and PET-FDG Negative preoperative staging at hilar and mediastinal level at CT and CT/PET (PET negative and lymph node short axis < 1 cm at CT scan) Age between 18 and 75 years old  Exclusion Criteria:  NSCLC smaller or equal than 1 cm Unfit for bronchoscopy or surgical resection Evidence of locally advanced or metastatic disease Prior chemotherapy or radiotherapy for this malignancy Other malignancy within the past 5 years except for not melanoma skin cancer, superficial bladder cancer or carcinoma in situ of the cervix Previous surgical treatment for lung cancer Multiple lung tumors