Chronic myelomonocytic leukaemia

A myelodysplastic/myeloproliferative neoplasm which is characterised by persistent monocytosis, absence of a Philadelphia chromosome and BCR/ABL1 fusion gene, fewer than 20 percent blasts in the bone marrow and blood, often myelodysplasia, and absence of PDGFRA or PDGFRB rearrangement.