Inotuzumab Ozogamicin in Treating Patients With B-cell Acute Lymphocytic Leukemia With Positive Minimal Residual Disease

PRIMARY OBJECTIVE: I. To evaluate the clinical efficacy of inotuzumab ozogamicin in patients B-cell acute lymphoblastic leukemia (ALL) in complete morphologic remission with positive minimal residual disease (MRD) in terms of relapse-free survival (RFS). SECONDARY OBJECTIVE: I. To evaluate other efficacy endpoints such as overall survival and MRD negativity rate by flow cytometry and/or polymerase chain reaction (PCR) overall and after the first cycle, as well as safety of inotuzumab ozogamicin in this setting. OUTLINE: Patients receive inotuzumab ozogamicin intravenously (IV) over 1 hour on days 1 and 8. Treatment repeats every 21-28 days for up to 6 cycles in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up at 30 day and then periodically every 6 months.