A case of myelodysplastic syndrome associated with CD14+CD56+ monocytosis, expansion of NK lymphocytes and defect of HLA-E expression

We describe an MDS patient showing neutropenia, CD14+CD56+ monocytosis and polyclonal expansion of NK cells. A defective HLA-E expression on myeloid lineage, the constitutive presence of CD178 on the CD14+CD56+ monocytes combined with expansion of CD94/NKG2A+ CD94/NKG2C+ NK cells are proposed to be relevant for the pathogenesis of this haematopoietic disorder