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Fludarabine Phosphate, Cyclophosphamide, and Laboratory-Treated T Cells in Treating Younger Patients with Relapsed or Refractory B-cell Acute Lymphoblastic Leukemia or Lymphoma

Trial Status: complete

This phase I trial studies the side effects and best dose of laboratory-treated T cells when given together with fludarabine phosphate and cyclophosphamide in treating younger patients with B-cell acute lymphoblastic leukemia or lymphoma that has come back or does not respond to treatment. Drugs used in chemotherapy, such as fludarabine phosphate and cyclophosphamide, work in different ways to stop the growth of cancer cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Placing a gene that has been created in the laboratory into white blood cells may make the body build an immune response to kill cancer cells. Giving fludarabine phosphate and cyclophosphamide before laboratory-treated T cells may kill more cancer cells.