Evaluation of Proton Therapy in Pediatric Cancer Patients

This is a Phase IV clinical trial observing and evaluating the safety of proton therapy in children. Protocol therapy is not being done as part of this clinical trial. The radiation targeting, planning, prescribed dose, fractionation, schedule, and use of other forms of therapy will be done per other therapeutic protocols at St. Jude Children's Research Hospital (SJCRH) at the discretion of the treating physicians associated with those trials.