IL-2 is an immune system chemical that controls the growth and function of many types of cells. The most frequent side effects are fatigue requiring rest for 1-2 hours per day and a low fever. Side effects are less frequent in the dose used in this trial. All participants will be taught to give themselves injections under the skin. The site of injection changes each day.
Treatment is daily for one year.
All participants will get a minimum of 4 weeks of treatment. Participants will return to the clinic every 2 weeks for a new supply of filled syringes. If after 4 weeks of treatment there is disease progression, treatment will be stopped. Both the participant and the doctor will know which treatment is being taken. IL-12, ifosfamide, etoposide .