Allogeneic peripheral blood cell transplantation for hypereosinophilic syndrome with myelofibrosis

Patients with hypereosinophilic syndrome (HES) display a very heterogeneous clinical picture ranging from asymptomatic cases to very aggressive forms. We report a 38-year-old woman with progressive HES who developed severe my elofibrosis and was treated by allogeneic stem cell transplantation, using peripheral blood (PBSCT) instead of bone marrow as the source of progenitor cells, after conditioning with cytoxan and busulphan, To the best of our k nowledge, this is the first case of HES with myelofibrosis treated with PBS CT, The patient remains alive 8 months post-PBSCT, and bone marrow fibrosis has significantly decreased following transplantation.