After completing treatment, there will be follow-up visits every 3 months for the first year. Every 6 months there will still be visits with the doctor until 4 years after completing treatment. You will continue to have follow-up visits every year after that to monitor for any signs of the disease coming back, or for as long as you would agree to allow follow-up visits. At each visit, you will have routine blood tests (about 2-3 teaspoons), checking of hormone levels, measurement of growth, and a hearing test. The effects of radiation/chemotherapy on your brain function, your ability to learn, and your quality of life will be measured. You will have a MRI of the brain, all known metastatic sites, and of the spine. Your body height and body weight will be measured. About 2 teaspoons of blood will be drawn for routine tests. Your urine will be tested for the presence of blood. You will have a spinal tap to look for cancer cells in the spinal fluid. Your hormone levels will also be taken to see if there are any signs of metabolic disorder and growth deficiency. This will be done with the other blood test and will not require any more extra blood samples from you.