About the Study

Leukemia: An informational registry & study screening for genetic changes (mutations) that may respond to specific drug therapies for relapsed or refractory leukemia

This study is for: • Patients less than 22 years old • Who have a known or suspected diagnosis of relapsed (has come back) or refractory (has not responded to earlier treatment) leukemia The goal of this study is to find better ways to diagnose and treat relapsed or refractory leukemia in children, adolescents and young adults. The Study Team will collect some information about each participant's cancer and treatment. The Study Team will also collect extra blood and/or bone marrow from procedures done by doctors to help make a diagnosis and learn more about different cancers now and in the future. If the Study Team finds out that the leukemia has a specific genetic change (mutation) that may respond to a drug that "targets" those changes, they may present a treatment study using that specific drug to the participant.

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Full Study Name: APAL2020SC