Pemetrexed, Carboplatin, and Bevacizumab as First-Line Therapy in Treating Older Patients With Stage IIIB or Stage IV Non-Small Cell Lung Cancer

RATIONALE: Drugs used in chemotherapy, such as carboplatin, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Pemetrexed may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Monoclonal antibodies, such as bevacizumab, can block tumor growth in different ways. Some block the ability of tumor cells to grow and spread. Others find tumor cells and help kill them or carry tumor-killing substances to them. Giving pemetrexed together with carboplatin and bevacizumab may kill more tumor cells.

PURPOSE: This phase II trial is studying how well giving pemetrexed together with carboplatin and bevacizumab works as first-line therapy in treating older patients with stage IIIB or stage IV non-small cell lung cancer.