Bone marrow aspirate consisting predominantly of left-shifted, dysplastic erythroids (Wright-Giemsa, 500x)
Erythroid precursors demonstrate cytoplasmic blebs and prominent vacuoles (Wright-Giemsa, 1000x)
A subset of erythroid precursors show mild megaloblastic change and binucleation (hematoxylin and eosin, 1000x)
The cytoplasm of the erythroids shows strong globular staining with PAS (periodic acid-Schiff stain, 1000x)
The bone marrow clot section shows a predominant population of immature cells (hematoxylin and eosin, 400x)
Immature cells are positive for E-cadherin ( 400x)
Immature cells are positive for Glycophorin A (400x)
Immature cells are positive for CD117 (400x)
Immature cells are negative for CD34 (400x)