The tumor will be measured by tests that are normally used to check the extent of disease in patients with the same type of cancer. This may include x-rays, MRIs, CT scans, or bone marrow biopsies. To collect a bone marrow biopsy, an area of the hip or chest bone is numbed with anesthetic and a small amount of bone marrow and bone is withdrawn through a large needle. Women who are able to have children must also have a negative pregnancy test in order to participate in this study.