In recent years, remarkable advances in medical oncology, surgery, and radiology have allowed for increasing cure rates for childhood malignancies. This success has led to an emerging understanding of the kinds of effects that treatments can have on the pediatric population and how such effects can influence pediatric cancer survivor's functioning and quality of life. It has become tremendously important to assess the long-term complications due to therapy in this growing sector of survivors and to tailor our treatments so as to minimize these late effects.