Radiation Therapy, Cisplatin, and Etoposide in Treating Patients With Non-small Cell Lung Cancer That Cannot Be Removed by Surgery

PRIMARY OBJECTIVES: I. To determine the maximum tolerated dose (MTD) of escalating doses of radiotherapy (RT) administered concomitantly with a fixed dose of cisplatin and etoposide within the same overall treatment time. OUTLINE: This is a dose-escalation study of radiation therapy. Patients undergo 3-dimensional conformal radiotherapy (3D-CRT) or intensity-modulated radiotherapy (IMRT) 5 days a week for 8 weeks. Patients also receive cisplatin intravenously (IV) over 60 minutes on days 1, 8, 28, and 36 and etoposide IV over 60 minutes on days 1-5 and 28-32. After completion of study treatment, patients are followed up at 8 weeks and 6 months.