International Study for Treatment of High Risk Childhood Relapsed ALL 2010

This international study develops and tests treatment plans for children whose acute lymphoblastic leukemia (ALL) — a type of blood cancer — has come back (relapsed) after initial treatment, focusing on high-risk cases where the cancer returned early or in the bone marrow. **You may be eligible if...** - You are a child under 18 years of age - You have been confirmed to have a first relapse of B-cell or T-cell ALL - Your case is classified as high-risk (for example: any relapse in the bone marrow, or very early isolated or combined relapse outside the bone marrow) - You are being treated at a participating center in the study - Written informed consent has been provided - You have not participated in another interfering clinical trial within 30 days of enrolling **You may NOT be eligible if...** - You are 18 years of age or older - Your cancer has relapsed more than once (this is for first relapses only) - You are currently enrolled in another clinical trial that conflicts with this protocol Talk to your doctor to see if this trial is right for you.