Abstract

The aim of this review is to update the current status of allogeneic hemopoietic stem cell transplants (HSCT) for patients with myelofibrosis (MF). We have first summarized the issue of an indication for allogeneic HSCT, discussing several prognostic scoring systems, developed to predict the outcome of MF, and therefore to identify patients who will benefit of an allogeneic HSCT. Patients with low risk MF are usually not selected for a transplant, whereas patients with intermediate or high risk MF are eligible. A separate issue, is how to predict the outcome of HSCT: we will outline a clinical molecular myelofibrosis transplant scoring system (MTSS), which predicts overall survival, ranging from 90% for low risk patients, to 20% for very high risk patients. We will also discuss transfusion burden and spleen size, as predictors of transplant outcome. The choice of a transplant platform including the conditioning regimen, the stem cell source and GvHD prophylaxis, are crucial for a successful program in MF, and will be outlined. Complications such as poor graft function, graft failure, GvHD and relapse of the disease, will also be reviewed. Finally we discuss monitoring the disease after HSCT with donor chimerism, driver mutations and hematologic data. We have made an effort to make this review as comprehensive and up to date as possible, and we hope it will provide some useful data for the clinicians.

Highlights

  • Andrea Bacigalupo 1,2*, Idanna Innocenti 1, Elena Rossi 1,2, Federica Sora 1,2, Eugenio Galli 1, Francesco Autore1, Elisabetta Metafuni1, Patrizia Chiusolo 1,2, Sabrina Giammarco 1, Luca Laurenti1,2, Giulia Benintende 2, Simona Sica 1,2 and Valerio De Stefano1,2

  • We have first summarized the issue of an indication for allogeneic hemopoietic stem cell transplants (HSCT), discussing several prognostic scoring systems, developed to predict the outcome of MF, and to identify patients who will benefit of an allogeneic HSCT

  • Radiotherapy may be indicated in patients who are not eligible for surgery or in patients who have lost their response to JAK2 inhibitors [26,27,28]

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Summary

INDICATIONS FOR HSCT

In the era of JAK inhibitors, allogeneic hematopoietic stem cell transplantation (HSCT) remains the only curative treatment for patients with Myelofibrosis (MF) [1]. The American Society for Transplantation and Cellular Therapy (ASTCT) considers an allogeneic HSCT “standard of care with clinical evidence” for patients with intermediate and high risk disease [2]. In order to classify patients as intermediate or high risk several models have been developed. The first two are based exclusively on clinical data, the third incorporates cytogenetics and the fourth includes mutational analysis.

Allogenic HSCT for Myelofibrosis
HOW TO DEAL WITH SPLENOMEGALY
PREDICTING THE OUTCOME OF HSCT
CONDITIONING REGIMENS AND RUXOLITINIB
TREATMENT OF MF RELAPSE AFTER ALLOGENEIC TRANSPLANT
DESIGNING A TRANSPLANT STRATEGY FOR MYELOFIBROSIS
Findings
AUTHOR CONTRIBUTIONS

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