Myeloid abnormalities in MDS demonstrated by CD45 versus side light scatter.

Data from patients with straightforward myelodysplastic syndrome, diagnosed by morphology. (A) Healthy donor bone marrow: normal granulocytes and precursors in the boxed region. (B) MDS patient bone marrow (ungated): hypogranular neutrophils with low side scatter (arrow) and a discrete blast population (oval) are demonstrated. (C) MDS patient bone marrow (ungated): hypogranular neutrophils with low side scatter (arrow) and a discrete blast population (oval) are demonstrated.