CD33 and Miyoshi myopathy: We next showed that G-type MDSC (CD11b+ CD33+ HLA-DRlow/− CD14− CD15+), but not M-type MDSC (CD11b+ CD33+ HLA-DRlow/− CD14+ CD15−), are significantly (*p < 0.05) increased in BMMC of MM patients (highest in relapsed/refractory MM) compared to MGUS/SMM patients or healthy donors (Fig. 3A).