EBUS TBNA After PET/CT in Diagnosing Patients With Stage I-IIA Non-small Cell Lung Cancer Evaluated for Stereotactic Body Radiation Therapy

Inclusion Criteria: 1. Patient must be \> 18 years old 2. Patient must have proven or suspected non small cell lung cancer (NSCLC) and be clinical Stage I or IIa, according to the 7th edition staging system of the American Joint Commission on Cancer for lung cancer (T1 or T2a, N0 or N1, M0) 3. Patient must have a PET/CT obtained within 40 days of having the EBUS-TBNA 4. Patient is being considered for SBRT 5. Patient or the patient's legally authorized representative must provide written informed consent prior to registration and any study-related procedures 6. If the patient is a survivor of a prior invasive cancer, all of the following criteria must apply: a) Patient has undergone potentially curative therapy for all prior malignancies b) No evidence of active / recurrent disease within 5 years Exclusion Criteria: 1. Patient has received prior chemotherapy or radiotherapy for this cancer 2. Patients already scheduled to receive conventional radiotherapy, chemotherapy, biological therapy, vaccine therapy, or surgery as treatment (except at disease progression) 3. Patients malignancy is consistent with well differentiated neuroendocrine (carcinoid) histology 4. Patients who are planning to undergo treatment in a different institution