She relapsed with detectable TEL-AML1 fusion gene even after chemotherapy and donor leukocyte infusions.     ///    An 11-year-old girl with TEL-AML1 fusion gene positive BALL who suffered a bone marrow relapse 28 months after remission from conventional chemotherapy.     ///    "However, the TEL-AML1 copies in her blood still increased and she died with leukemia relapse after additional CAR-T cell infusion. "