Bone marrow neoplastic

Bone marrow - neoplastic myeloid

MDS / MPN

MDS / MPN - unclassifiable



Last author update: 1 August 2011
Last staff update: 20 July 2022

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PubMed Search: MDS/MPN unclassifiable


Nikhil Sangle, M.D.
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Cite this page: Sangle N. MDS / MPN - unclassifiable. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/myeloproliferativemdsmpnunclassified.html. Accessed January 29th, 2023.
Definition / general
  • This is a provisional myelodysplasia / myeloproliferative disorder, with JAK2 V617F mutation present in 48 - 67% (Haematologica 2008;93:34, Blood 2006;108:2173)
  • Diagnostic criteria: features of one of the myelodysplasia / myeloproliferative categories but no history of MDS/MPN, no history of growth factor or cytotoxic therapy, no BCR-ABL1 gene fusion, no rearrangement of PDGFRA, PDGFRB or FGFR1, no del(5q), no inv(3)(q21;q26) OR de novo disease with MPN and MDS features which cannot be assigned to any specific category of MDS/MPN
  • Includes refractory anemia with ringed sideroblasts (RARS) with dyserythropoiesis and marked thrombocytosis (RARS-T) with megakaryocytes similar to those in ET, PV or primary myelofibrosis
Case reports
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