Allogeneic hematopoietic stem cell transplantation for treating patients with myelofibrosis
Abstract
Within Ph-negative myeloproliferative types of cancer, myelofibrosis is the most frequent indication for performing allogeneic hematopoietic stem cell transplantation (allo-HSCT). Because this is a high-risk procedure, only those patients with a predicted overall survival below 5 years become eligible, as well as those of intermediate-2 or high disease risk; as defined by the IPSS, DIPSS and DIPSS Plus prognostic indices. It has however recently been recognised that patients with a poor prognosis, who belong to the intermediate-1 disease risk group, need to be distinguished and also considered for allo-HSCT. According to ELN/EBMT recommendations from 2015, this group should include patients requiring red blood cell concentrate transfusions who have more than 2% blasts in the circulation and/or an adverse karyotype. When qualifying patients for transplantation, consideration should also be given to adverse molecular risk factors such as the so-called triple negativity (absence of JAK, CALR and MPL mutations) and the presence of ASXL1 mutation. Over recent years, the number of allo-HSCT performed on patients with MF has significantly risen because the number of transplantations using reduced-intensity conditioning regimens has increased, together with those from unrelated donors (cord blood, haploidentical donors). There is a lack of randomised studies comparing the effectiveness of this transplantation procedure according to the types of conditioning and donor selection.
Keywords: myelofibrosistransplantationallogeneic hematopoietic stem cell transplantation (allo-HSCT)transplantationreduced-intensity conditioning (RIC)myeloablative conditioning (MAC)ruxolitinib
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