Bevacizumab, Pemetrexed Disodium, and Cisplatin or Erlotinib Hydrochloride and Bevacizumab in Treating Patients With Stage IV Non-Small Cell Lung Cancer. A Multicenter Phase II Trial Including Biopsy at Progression (BIO-PRO Trial).

RATIONALE: 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. Drugs used in chemotherapy, such as pemetrexed disodium and cisplatin, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Erlotinib hydrochloride may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. It is not yet known whether bevacizumab given together with pemetrexed disodium and cisplatin is more effective than erlotinib hydrochloride given together with bevacizumab in treating patients with non-small cell lung cancer. PURPOSE: This phase II trial is studying giving bevacizumab together with pemetrexed disodium and cisplatin to see how well it works compared with giving erlotinib hydrochloride together with bevacizumab in treating patients with stage IV non-small cell lung cancer.