As in CML cells are often present genomic abnormalities41,42, we hypothesized that deletion of Morgana coding gene (CHORDC1) could account for the low Morgana levels detected in the BM of patients affected by MDS/MPN with neutrophilia and in a subgroup of CML patients. This evidence concerns the gene CHORDC1 and chronic myelogenous leukemia, BCR-ABL1 positive.