Two distinctive expression patterns of immunophenotypes can be observed: low-grade MDS showed significantly higher CD15, CD11b, CD4 and CD56 expression on CD34+ blasts, whereas high-grade MDS showed remarkably higher CD117 and lower CD19 and CD38 expression on CD34+ blasts as well as a higher percentage of CD34+ blasts. This evidence concerns the gene KIT and myelodysplastic syndrome.