Cisplatin, Etoposide, and Radiation Therapy in Treating Patients With Limited-Stage Small Cell Lung Cancer

RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Radiation therapy uses high-energy x-rays to damage tumor cells. Combining more than one chemotherapy drug with radiation therapy may kill more tumor cells. PURPOSE: This phase II trial is studying how well giving cisplatin and etoposide together with radiation therapy works in treating patients with limited-stage small cell lung cancer.