Fig. 1. myelodysplastic syndrome, trilineage hematopoiesis without leukemic iniftrate, H&E, x 40
Fig. 2. Myelodysplastic syndrome, a cluster of dysplastic normoblasts with irregular nuclei and cytoplsmic vacuoles; a pseudo-Pelger-Huet cell (arrow) is present, bone marrow aspirate, Wright-Giemsa, x 100
Fig. 3. A complex karyotype
Fig. 4. Pure erythroid leukemia, extensive immature erythroid infiltrate, bone marrow biopsy, H&E, x 20
Fig. 5. Pure erythroid leuekemia, normoblastic infiltration, leukemic cells show regular nuclear contour and prominent nucleoli, bone marrow biopsy, H&E, x 100
Fig. 6. Pure erythroid leukemia, many leukemic cells stained positive for E-cadherin, bone marrow biopsy, immunoperoxidase, x 100
Fig. 7. Pure erythroid leukemia, many leukemic cells stained positive for glycophorin A, bone marrow biopsy, immunoperoxidase, x 100
Fig. 8. Pure erythroid leukemia, many leukemic cells stained positive for CD117, bone marrow biopsy, immunoperoxidase, x 100
Fig. 9. Pure erythroid leukemia, many leukemic erythroblasts with irregular nuclei and cytoplasmic vacuoles are present, two binucleated leukemic cells are in the center (arrows), touch imprint, Wright-Giemsa, x 50
Fig. 10. Pure erythroid leukemia, two pronormoblasts with coarse PAS positive granules, aspirate smear, PAS, x 100