Key Adverse Events After Childhood Cancer

The goals of this study are 1) to look at how late-occurring complications develop among individuals going through treatment for childhood cancer, 2) to see how late-occurring complications relate to the type of cancer, stage of cancer and treatment; and 3) to compare those who have had cancer and who have a late-occurring complication to those who have had cancer and who do not have a late-occurring complication (but have the same diagnosis) in order to see if certain individuals, cancer treatment(s), or genes (the part of the cell that carries characteristics from parent to child) are related to an increased risk of getting a late-occurring complication.