Other possible indicators of MDS are increased HLA-DR/CD34 ratios, decreased or absent CD38 expression on CD34 progenitor cells, and increased myeloblast frequency (CD34+/CD19−) (Figure 2); also, increased myeloblast percentage values (≥2%) add 1 point to the Ogata Score (15). This evidence concerns the gene CD19 and myelodysplastic syndrome.