Maintenance Chemotherapy With or Without Local Consolidative Therapy in Treating Patients With Stage IV Non-small Cell Lung Cancer

Inclusion Criteria: * Patients must have the psychological ability and general health that permits completion of the study requirements and required follow up * Women of childbearing potential and men who are sexually active should be willing and able to use medically acceptable forms of contraception during the trial and for up to 180 days after completion of all treatment to prevent pregnancy or fathering a child. * Pathologically proven diagnosis of NSCLC, with metastases (stage IV disease) present prior to registration; this includes patients newly diagnosed with metastatic disease or those initially diagnosed and treated for stage I-III NSCLC who ultimately develop limited metastases. Limited metastases is defined as 3 or fewer sites of metastatic disease * Appropriate stage for study entry based on the following diagnostic workup: * History/physical examination by a radiation oncologist (and a surgeon if surgery is planned) within 30 days prior to registration * Imaging proof of limited metastatic disease and response to therapy/stable disease, by at least diagnostic quality CT chest through the adrenals or positron emission tomography (PET)/CT within 30 days prior to registration * Zubrod performance status 0, 1, or 2 within 30 days prior to registration * Adequate organ and hematologic/bone marrow function within 14 days prior to registration, defined as follows: * Aspartate transaminase (AST) and alanine transaminase (ALT) ≤ 2.5 × upper limit of normal (ULN)…