Chemotherapy, Radiotherapy and Bevacizumab in Patients With Unresectable Stage III Non-Small-Cell Lung Cancer

The patients on this study will receive treatment in 3 stages of therapy. The first stage is Induction Therapy. This therapy is 7 weeks long. Patients will receive bevacizumab followed by pemetrexed followed by carboplatin all by vein once a week in weeks 1 and 4. During Induction patients will also receive radiation therapy daily, Monday through Friday, for 7 weeks (weeks 1-7). This is followed by 2 weeks of rest. During this rest period patients will have scans done to see how their disease has responded to treatment. The next stage of treatment is Consolidation Therapy. This stage is 10 weeks long. Patients will receive bevacizumab followed by pemetrexed followed by carboplatin all by vein once a week in weeks 10, 13 and 16. This is followed by 3 weeks rest. During week 19 patients will have scans to see how their disease has responded to treatment. The last stage of treatment is Maintenance Therapy. Patients will receive bevacizumab alone by vein every 3 weeks. Treatment will be given every three weeks for up to 9 treatments. (week 45)