As an outpatient, the patient will be monitored to make sure their immune system (system in the body that helps protect the body and fights bacterial, viral and fungal infections) is recovering, and the patient may require additional infusions of immunoglobulins (infection-fighting blood proteins) until the blood protein levels are safe. The patient will also be taking antibiotic pills for about 6 months to prevent infections. They will have x-rays and other diagnostic tests (PET scans) every 6-12 months during the next 5 years to make sure the tumor stays under control.