The average expression of TET2 mRNA was 0.63 (0.28-1.01) in RA and RAS patients, 0.39 (0.09-1.23) in RCMD patients, and 0.27 (0.11-0.91) in RAEB patients. This evidence concerns the gene TET2 and myelodysplastic syndrome with single lineage dysplasia.