Efficacy of lenalidomide in the treatment of myelodysplastic/myeloproliferative neoplasms, unclassifiable (MDS/MPN-U) with the presence of deletion 5q– and trisomy 8+

Myelodysplastic/myeloproliferative neoplasms (MDS/MPN) are very rare clonal myeloid characterized by the simultaneous presence of both of erythrocytic and/orgranulocytic dysplasia with myeloproliferative features. The etiology of the disease remains unknown. The MDS/MPN group is made up of five disorders: chronic myelomonocytic leukemia, atypical chronic myeloid leukemia, juvenile myelomonocytic leukemia, MDS/MPN ring sideroblasts with thrombocytosis and MDS/MPN, un classifiable (MDS/MPN-U). MDS/MPN-U remains the leastcharacterized entity. It accounts less than 5% of all myeloid disorder. The reare currently no well-established diagnostic criteria. The disease is heterogeneous with outclear management strategies. The aim of thispaperis to present a case of a 59-year-old female patient diagnosed with MDS/MPN-U with deletion 5q– and trisomy 8+, whom lenalidomide 10 mg daily has been used as monotherapy. The disease has initially manifested as severe cytopenias, multiple transfusions of blood preparations were required. Currently patientis in the 9th month of treatment. Hemoglobin, platelets and white blood cells returned to normal. The patient completely became independent of transfusion of red blood cell concentrates. No adverse events were observed.