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Intensified chemotherapy shows promise for children with very high risk form of leukemia
Date:12/10/2012

Young patients with an aggressive form of leukemia who are likely to relapse after chemotherapy treatment can significantly reduce those odds by receiving additional courses of chemotherapy, suggest the findings of a clinical trial led by investigators at Dana-Farber/Children's Hospital Cancer Center in Boston.

The trial leaders will present the results of the Dana-Farber Cancer Institute ALL Consortium study, which involved nearly 500 patients under age 18 with B-precursor acute lymphoblastic leukemia (B-ALL), at the annual meeting of the American Society of Hematology (ASH) conference.

Trial participants received an initial course of "induction" chemotherapy for B-ALL, a cancer of the blood that is one of the most common cancers in children below age 15. After a month of treatment, the patients had a bone marrow sample sent for a test able to measure levels of leukemia that cannot be seen under a microscope.

Thirty-five of the patients were deemed to have a very high risk of relapsing because they retained relatively large numbers of leukemia cells as measured by this test. An additional 16 patients were also considered very high-risk because their leukemia cells had certain chromosomal abnormalities.

These 51 patients then received an intensified treatment regimen consisting of two additional rounds of chemotherapy using agents not typically given to newly diagnosed patients with B-ALL. This was followed by an intensified consolidation phase of therapy to keep the disease in remission, and then a standard maintenance phase to further deter the disease from returning.

Investigators estimate that, five years after reaching complete remission, the rate of event-free survival (a measure of survival without relapse or development of another cancer) was 76 percent for these very high-risk patients. By contrast, less than half of similar patients who receive standard chemotherapy reach the five-year mark without relapsing.'/>"/>

Contact: Teresa Herbert
teresa_herbert@dfci.harvard.edu
Dana-Farber Cancer Institute
Source:Eurekalert

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