Myeloid cell immunophenotyping is an important tool for the diagnosis of myeloid dysplasia in MDS [18], which can be accompanied by a variety of myeloid cell immunophenotypic abnormalities characterised by abnormal granulocyte CD13/CD16 phenotypes, abnormal expression of CD56 by monocytes and decreased expression of CD71 by erythrocytes [19, 20]. The gene discussed is NCAM1; the disease is myelodysplastic syndrome.