BCOR and chronic myelomonocytic leukemia: Next-generation sequencing studies have demonstrated that somatic BCOR mutations occur in a range of conditions that affect the myeloid and erythroid haematopoietic lineages including acute myeloid leukaemia (AML), myelodysplastic syndrome (MDS), chronic myelomonocytic leukaemia (CMML) and aplastic anaemia2–6.