If you have had a partial or complete response at the end of all planned therapy, you will need to return to the clinic for follow-up visits at least once every 6 months for the first 36 months (from the end of therapy). After that, you will have follow-up visits at least once a year, unless the disease gets worse and re-treatment is necessary. At the follow-up visits, you will have a physical exam, including measurement of vital signs, height, and weight. You will be asked about any side effects that you may have experienced. Blood (about 4-6 teaspoons) will be drawn for routine tests and to check the status of your WM. Depending on the results of your original urine tests, you may need to collect your urine over 24 hours to see how your WM is responding. If your initial CT scans showed lesions that appear to be caused by WM, you will have CT scans and an x-ray of your chest repeated at this time.