Reduced mortality following bone marrow transplantation for breast cancer with the addition of peripheral blood progenitor cells is due to a marked reduction in veno-occlusive disease of the liver

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Abstract
Clinical trials involving breast cancer in the Duke University Bone Marrow Transplant Program were evaluated to assess the association between type of hematopoietic support and treatment-related morbidity/ mortality. Case histories of patients treated with high-dose chemotherapy and hematopoietic rescue on three separate protocols between 1986 and 1994 were reviewed. This included 307 patients with stage IV disease and 85 patients with high-risk (10 or more positive axillary lymph nodes) stage II or III disease. One hundred and twenty-eight of these patients were rescued with autologous bone marrow (BM) alone and 264 additionally received autologous peripheral blood progenitor cells (PBPC). The 100 day transplant-related mortality rate in those patients who received BM alone was 20.3%, with an overall mortality rate due to the high-dose chemotherapy procedure of 24.2%. The PBPC-treated group experienced a 100 day transplant-related mortality of only 6.1% and an overall transplant- related mortality of 10.2%. Sixteen of 31 deaths were attributed to veno-occlusive disease (VOD) in the group that received BM alone compared to only one VOD-related death in the PBPC group. These data demonstrate a marked improvement in transplant-related mortality which is related to the use of PBPC. This effect has been almost entirely due to a reduction in mortality from hepatic veno-occlusive disease.

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