The mean fluorescence index (MFI) levels of CD54 on the CD33+CD11b+ neutrophils were significantly increased in MDS patients (5510 ± 1590 in LR-MDS and 8906 ± 2103 in HR-MDS) as compared with healthy controls (3182 ± 1187) (Figures 1E, F). This evidence concerns the gene CD33 and myelodysplastic syndrome.