Pemetrexed Disodium and Bevacizumab in Treating Patients With Stage III or Stage IV Non-Small Cell Lung Cancer

RATIONALE: Drugs used in chemotherapy, such as pemetrexed disodium, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. 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. Bevacizumab may also stop the growth of tumor cells by blocking blood flow to the tumor. Giving pemetrexed disodium together with bevacizumab may be an effective treatment for non-small cell lung cancer.

PURPOSE: This phase II trial is studying how well giving pemetrexed disodium together with bevacizumab works in treating patients with stage III or stage IV non-small cell lung cancer.