Childhood Cancer Survivor Study

The study will focus on the following objectives: * Characterize survivors' health with respect to disease- and treatment-related factors. * Investigate the consequences of various intensities of exposure to chemotherapy and/or radiation on health outcomes (e.g., cardiovascular, reproductive, second cancers, etc…). * Compare the mortality experience of survivors with the general population. * Characterize the health-related behaviors, patterns of medical care, and medical follow-up needs of survivors. * Describe patterns of familial aggregation of cancer, including known (and variations of) cancer family syndromes. * Collect and store biologic samples (saliva, blood, second tumor tissue) to correlate with health outcomes and use for future research.