Comprehensive Omics Analysis of Pediatric and Adult Solid Tumors and Establishment of a Repository for Related Biological Studies

Background: \- Laboratory investigators who are studying common childhood cancers are interested in developing a tissue repository to collect and store blood, serum, tissue, urine, or tumors of children who have cancer or adults who have common childhood cancers. To develop this repository, additional samples will be collected from children and adults who have been diagnosed with common childhood cancers such as leukemia and tumors of the central nervous system. Objectives: \- To collect and store blood, serum, tissue, urine, or tumor samples of children who have cancer or adults who have common childhood cancers. Eligibility: * Individuals who have been diagnosed with a common childhood cancer (e.g., leukemia) regardless of patient age. * Children, adolescents, and adults who have been diagnosed with a type of cancer more commonly found in adults. Design: * Extra blood, serum (the liquid part of blood), tissue, urine, or tumor samples will be collected from participants at a time when sampling is required for medical care or as part of a research study. * No additional procedures will be performed for the sole purpose of obtaining additional tumor tissue, aside from what is required for clinical care.