Before each cycle of therapy and 1 month after treatment ends, you will have a physical exam. Blood (about 2-3 teaspoons) will be drawn for routine tests. CT scans or MRI will be repeated every 2-3 cycles and at the end of treatment. If you have any tumors in your chest, a chest x-ray will be repeated every 2-3 cycles and at the end of treatment. If you have a partial or complete response (the tumor shrinks or disappears completely) or the disease is stable (where the tumor has neither grown nor shrunk), the CT or MRI will be repeated 4 weeks later to check the response.