<qa>  What is the name of the test that you may have at this visit?If you are eligible to continue on this study, a new 28-day supply of lenalidomide capsules will be given to you at this visit. Other tests may be done at these visits to check on the status of the disease. You may have a sample of bone marrow collected andor have either x-rays or CT scans, positron emission tomography PET scan if needed, and gastrointestinal endoscopy for patients with known or suspected site of disease to evaluate your response to therapy. These tests may not be done at every check-up visit. They will be done when your doctor feels they are necessary. You may have unscheduled visits at any time during this study if your doctor feels it is necessary for your care. 