Long-term Follow-up of 14 Patients with Philadelphia Chromosome—Positive Acute Lymphoblastic Leukemia following Autologous Bone Marrow Transplantation in First Complete Remission

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Abstract
We describe the clinical outcome of autologous bone marrow transplantation (ABMT) for patients with Philadelphia chromosome —positive acute lymphoblastic leukemia (Ph-ALL). Between 1985 and 2000, 14 patients in first complete remission underwent transplantation. In all cases, harvested marrow was purged with a cocktail of complement and monoclonal antibodies to common acute lymphoblastic leukemia antigen (CALLA). Eight patients died following BMT: 2 patients from interstitial pneumonia and 6 from disease recurrence. For the 6 surviving patients in continuous remission, the median follow-up period was 96 months. The probability of disease-free survival and the rate of relapse at 5 years were 41.7% and 51.4%, respectively. Minimal residual disease (MRD) was assayed quantitatively with patient-specific D-JH probes in 6 of 14 cases. A higher residual tumor burden at marrow harvest was associated with subsequent relapse. Efforts to reduce the MRD burden before harvesting stem cells should improve the clinical outcome of ABMT.

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