We are doing this study to find better ways to diagnose, treat and prevent cancers in children, adolescents and young adults. To do this, we need to learn more about cancers that happen to children, adolescents and young adults. As most cancers that children get are rare, we can best learn by combining information from as many children with cancer as possible. For this study we would like to collect some information about your cancer and treatment. We would also like to collect extra tumor from procedures done by doctors to help make a diagnosis. In some cases we would also like to collect a small amount of blood, bone marrow, or other tissue from you. This study does not decide your treatment and you can get regular cancer treatment without being in this study. However, some of the information from this study might help your doctor find out if research treatment protocols may be available for you, or in some cases, if other treatments can be recommended for you.