With correlation of clinical parameters, the previous study has shown CD33 positivity was associated with higher serum LDH and β2-microglobulin concentrations and higher incidence rates of anemia or thrombocytopenia [16], and this study showed a significant association between CD33 positivity and higher serum LDH concentration (P = 0.018). This evidence concerns the gene HLA-G and anemia (phenotype).